FILED OF INVENTION
[001] The present disclosure relates to the field of hygiene and consumer goods. In general, the present disclosure provides a process for preparation of a stable cleansing composition, in particular a hand wash composition.
BACKGROUND OF INVENTION
[002] Cleansing of body following proper hygiene practices helps in getting away with visible dirt as well as microscopic germs. Numerous personal cleansing products are available in order to maintain a required level of hygiene. Liquid cleansing compositions are well known and amongst various cleansing compositions, hand wash formulations are becoming popular and people prefer to use them same several times a day to wash their hands.
[003] Touching objects, surfaces, and even people, throughout the day leads to the accumulation of germs on hands which can lead to infections and illness. Frequent hand washing is attributed to be one of the best ways to avoid illness and also spreading it. Hand wash compositions are typically formulated in order to provide good foaming, and cleaning and effective in killing germs. The hand washes are made either from soap or surfactant. Additionally, the hand washes may consist of moisturizers or other skin benefit agents to promote mildness and skin conditioning.
[004] However, there are many problems associated with the existing hand wash formulations including irritation due to higher pH, poor compliance, phase separation, viscosity dropping at various temperature conditions.
[005] In view of limitations in the existing hand wash formulations there remains a need for hand wash composition that exhibit lower pH with a balance of effective cleansing, high foam, and stability, thereby avoiding irritation of the skin without affecting viscosity drop down or raise issues.
SUMMARY OF THE INVENTION
[006] In an aspect of the present disclosure, there is provided a process for preparation of a cleansing composition including the steps of: (i) contacting at least one surfactant with citric acid to obtain a first mixture; and (ii) contacting the first

mixture with sodium chloride to obtain the cleansing composition, wherein said cleansing composition is stable and exhibits viscosity in the range of 2000 to 4000 cps.
[007] In an aspect of present invention, there is provided a process for preparation of a cleansing composition including the steps of: (i) contacting at least one surfactant with at least one chelating agent, at least one emollient, and at least one diluent to obtain an initial mixture; (ii) contacting the initial mixture with at least one component selected from the group consisting of at least one humectant, at least one preservative, at least one antioxidant, at least one solubilizer, and combinations thereof to obtain a mixture; (iii) contacting the mixture with citric acid to obtain a first mixture; and (iv) contacting the first mixture with sodium chloride to obtain the cleansing composition.
[008] These and other features, aspects, and advantages of the present subject matter will be better understood with reference to the following description and appended claims. This summary is provided to introduce a selection of concepts in a simplified form. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
DETAILED DESCRIPTION OF THE INVENTION
[009] Those skilled in the art will be aware that the present disclosure is subject to variations and modifications other than those specifically described. It is to be understood that the present disclosure includes all such variations and modifications. The disclosure also includes all such steps, features, compositions, and compounds referred to or indicated in this specification, individually or collectively, and any and all combinations of any or more of such steps or features. Definitions
[0010] For convenience, before further description of the present disclosure, certain terms employed in the specification, and examples are delineated here. These definitions should be read in the light of the remainder of the disclosure and understood as by a person of skill in the art. The terms used herein have the meanings recognized and known to those of skill in the art, however, for

convenience and completeness, particular terms and their meanings are set forth
below.
[0011] The articles “a”, “an” and “the” are used to refer to one or to more than one
(i.e., to at least one) of the grammatical object of the article.
[0012] The terms “comprise” and “comprising” are used in the inclusive, open
sense, meaning that additional elements may be included. It is not intended to be
construed as “consists of only”.
[0013] Throughout this specification, unless the context requires otherwise the
word “comprise”, and variations such as “comprises” and “comprising”, will be
understood to imply the inclusion of a stated element or step or group of element or
steps but not the exclusion of any other element or step or group of element or
steps.
[0014] The term “including” is used to mean “including but not limited to”.
“Including” and “including but not limited to” are used interchangeably.
[0015] The term “stable cleansing composition” refers to cleansing composition
that under various temperature conditions does not phase separate for at least four
weeks at 500C.
[0016] Unless defined otherwise, all technical and scientific terms used herein have
the same meaning as commonly understood by one of ordinary skill in the art to
which this disclosure belongs. Although any methods and materials similar or
equivalent to those described herein can be used in the practice or testing of the
disclosure, the preferred methods, and materials are now described. All
publications mentioned herein are incorporated herein by reference.
[0017] The present disclosure is not to be limited in scope by the specific
embodiments described herein, which are intended for the purposes of
exemplification only. Functionally-equivalent products, compositions, and methods
are clearly within the scope of the disclosure, as described herein.
[0018] As discussed above, most of the available hand wash formulations either
made from soap or surfactants, are associated with problems, such as, irritation on
skin due to higher pH, phase separation and viscosity dropping at different
temperature conditions. In view of all the problems mentioned above, the present

disclosure provides a process for making a hand wash formulation having a pH of
3.5 to 4.8, thereby making it milder to match with skin pH without affecting
viscosity of the cleansing compositions.
[0019] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition including the steps of: (i) contacting at least
one surfactant with citric acid to obtain a first mixture; and (ii) contacting the first
mixture with sodium chloride to obtain the cleansing composition, wherein said
cleansing composition is stable and exhibits viscosity in the range of 2000 to 4000
cps.
[0020] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein the surfactant
is selected from the group consisting of cocamide monoethanolamine (cocamide
MEA), disodium laureth sulfosuccinate, cocamidopropyl betaine, sodium laureth
ether sulphate, PEG-40 hydrogenated castor oil, and combinations thereof.
[0021] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein the surfactant
is cocamide monoethanolamine (cocamide MEA), disodium laureth sulfosuccinate,
and cocamidopropyl betaine.
[0022] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein the at least one
surfactant is contacted with citric acid at a temperature in the range of 40-80 °C for
a period in the range of 5–60 minutes at a stirring speed in the range of 20 to 100
rpm to obtain a first mixture.
[0023] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein the at least one
surfactant is contacted with citric acid at a temperature in the range of 40-80 °C for
a period in the range of 15–30 minutes at a stirring speed in the range of 20 to 50
rpm to obtain a first mixture.
[0024] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein the first
mixture is contacted with the sodium chloride at a temperature in the range of 25-

45°C for a period in the range of 5-45 minutes at a stirring speed in the range of 10-50 rpm to obtain the cleansing composition.
[0025] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition as described herein, wherein the first mixture is contacted with the sodium chloride at a temperature in the range of 35-45°C for a period in the range of 15-30 minutes at a stirring speed in the range of 20-50 rpm to obtain the cleansing composition.
[0026] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition including the steps of: (i) contacting at least one surfactant with citric acid at a temperature in the range of 40-80 °C for a period in the range of 5–60 minutes at a stirring speed in the range of 20 to 100 rpm to obtain a first mixture; and (ii) contacting the first mixture with sodium chloride at a temperature in the range of 25- 45°C for a period in the range of 5-45 minutes at a stirring speed in the range of 10-50 rpm to obtain the cleansing composition; wherein cleansing composition is stable and exhibits viscosity in the range of 2000 to 4000 cps.
[0027] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition including the steps of: (i) contacting at least one surfactant with citric acid at a temperature in the range of 40-80 °C for a period in the range of 15–30 minutes at a stirring speed in the range of 20 to 50 rpm to obtain a first mixture; and (ii) contacting the first mixture with sodium chloride at a temperature in the range of 35- 45°C for a period in the range of 15-30 minutes at a stirring speed in the range of 20-50 rpm to obtain the cleansing composition, wherein cleansing composition is stable and exhibits viscosity in the range of 2000 to 4000 cps.
[0028] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition including steps of: (i) contacting at least one surfactant with at least one chelating agent, at least one emollient, and at least one diluent to obtain an initial mixture; (ii) contacting the initial mixture with at least one component selected from the group consisting of at least one humectant, at least one preservative, at least one antioxidant, at least one solubilizer, and

combinations thereof to obtain a mixture; (iii) contacting the mixture with citric acid to obtain a first mixture; and (iv) contacting the first mixture with sodium chloride to obtain the cleansing composition.
[0029] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition as described herein, wherein the surfactant is contacted with at least one chelating agent, at least one emollient, and at least one diluent at a temperature in the range of 65-80 °C for a period in the range of 5– 30 minutes at a stirring speed in the range of 20-100 rpm to obtain an initial mixture; the initial mixture is contacted with at least one component selected from the group consisting of at least one humectant, at least one preservative, at least one antioxidant, at least one solubilizer, at a temperature in the range of 20-70 °C for a period in the range of 5–60 minutes at a stirring speed in the range of 20-50 rpm to obtain a mixture; the mixture is contacted with citric acid to obtain a first mixture at a temperature in the range of 40 to 80 °C for a period in the range of 5-60 minutes at a stirring speed in the range of 20 to 100 rpm, and the first mixture is contacted with sodium chloride at a temperature in the range of 25-45 °C for a period in the range of 5-45 minutes at a stirring speed in the range of 10 to 50 rpm to obtain the cleansing composition.
[0030] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition wherein the surfactant is contacted with at least one chelating agent, at least one emollient, and at least one diluent at a temperature in the range of 70-80 °C for a period in the range of 15–30 minutes at a stirring speed in the range of 20 to 50 rpm to obtain an initial mixture; the initial mixture is contacted with at least one component selected from the group consisting of at least one humectant, at least one preservative, at least one antioxidant, at least one solubilizer, at a temperature in the range of 30-70 °C for a period in the range of 5–30 minutes at a stirring speed in the range of 20-50 rpm to obtain a mixture; the mixture is contacted with citric acid to obtain a first mixture at a temperature in the range of 40 to 80 °C for a period in the range of 15-30 minutes at a stirring speed in the range of 20 to 50 rpm, and the first mixture is contacted with sodium chloride at a temperature in the range of 35-45 °C for a

period in the range of 15-30 minutes at a stirring speed in the range of 20 to 50 rpm to obtain the cleansing composition.
[0031] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition as described herein, wherein the first mixture has a pH in the range of 3.5-4.8.
[0032] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition as described herein, wherein the cleansing composition has a pH in the range of 3.5-4.8.
[0033] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition as described herein, wherein the cleansing composition has a viscosity in the range of 2000-4000 cps.
[0034] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition as described herein, wherein the cleansing composition has a viscosity in the range of 2200-4000 cps.
[0035] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition wherein the surfactant is contacted with at least one chelating agent, at least one emollient, and at least one diluent at a temperature in the range of 65-80 °C for a period in the range of 5–30 minutes at a stirring speed in the range of 20-100 rpm to obtain an initial mixture; the initial mixture is contacted with at least one component selected from the group consisting of at least one humectant, at least one preservative, at least one antioxidant, at least one solubilizer, at a temperature in the range of 20-70 °C for a period in the range of 5–60 minutes at a stirring speed in the range of 20-50 rpm to obtain a mixture; the mixture is contacted with citric acid to obtain a first mixture at a temperature in the range of 40 to 80 °C for a period in the range of 5-60 minutes at a stirring speed in the range of 20 to 100 rpm, and the first mixture is contacted with sodium chloride at a temperature in the range of 25-45 °C for a period in the range of 5-45 minutes at a stirring speed in the range of 10 to 50 rpm to obtain the cleansing composition, wherein the cleansing composition has a viscosity in the range of 2000-4000 cps.

[0036] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition wherein the surfactant is contacted with at least one chelating agent, at least one emollient, and at least one diluent at a temperature in the range of 65-80 °C for a period in the range of 5–30 minutes at a stirring speed in the range of 20-100 rpm to obtain an initial mixture; the initial mixture is contacted with at least one component selected from the group consisting of at least one humectant, at least one preservative, at least one antioxidant, at least one solubilizer, at a temperature in the range of 20-70 °C for a period in the range of 5–60 minutes at a stirring speed in the range of 20-50 rpm to obtain a mixture; the mixture is contacted with citric acid to obtain a first mixture at a temperature in the range of 40 to 80 °C for a period in the range of 5-60 minutes at a stirring speed in the range of 20 to 100 rpm, and the first mixture is contacted with sodium chloride at a temperature in the range of 25-45 °C for a period in the range of 5-45 minutes at a stirring speed in the range of 10 to 50 rpm to obtain the cleansing composition, wherein the cleansing composition has a viscosity in the range of 2200-4000 cps.
[0037] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition wherein the surfactant is contacted with at least one chelating agent, at least one emollient, and at least one diluent at a temperature in the range of 70-80 °C for a period in the range of 15–30 minutes at a stirring speed in the range of 20 to 50 rpm to obtain an initial mixture; the initial mixture is contacted with at least one component selected from the group consisting of at least one humectant, at least one preservative, at least one antioxidant, at least one solubilizer, at a temperature in the range of 30-70 °C for a period in the range of 5–30 minutes at a stirring speed in the range of 20-50 rpm to obtain a mixture; the mixture is contacted with citric acid to obtain a first mixture at a temperature in the range of 40 to 80 °C for a period in the range of 15-30 minutes at a stirring speed in the range of 20 to 50 rpm, and the first mixture is contacted with sodium chloride at a temperature in the range of 35-45 °C for a period in the range of 15-30 minutes at a stirring speed in the range of 20 to 50 rpm

to obtain the cleansing composition, wherein the cleansing composition has a viscosity in the range of 2000-4000 cps.
[0038] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition wherein the surfactant is contacted with at least one chelating agent, at least one emollient, and at least one diluent at a temperature in the range of 70-80 °C for a period in the range of 15-30 minutes at a stirring speed in the range of 20 to 50 rpm to obtain an initial mixture; the initial mixture is contacted with at least one component selected from the group consisting of at least one humectant, at least one preservative, at least one antioxidant, at least one solubilizer, at a temperature in the range of 30-70 °C for a period in the range of 5-30 minutes at a stirring speed in the range of 20-50 rpm to obtain a mixture; the mixture is contacted with citric acid to obtain a first mixture at a temperature in the range of 40 to 80 °C for a period in the range of 15-30 minutes at a stirring speed in the range of 20 to 50 rpm, and the first mixture is contacted with sodium chloride at a temperature in the range of 35-45 °C for a period in the range of 15-30 minutes at a stirring speed in the range of 20 to 50 rpm to obtain the cleansing composition, wherein the cleansing composition has a viscosity in the range of 2200-4000 cps.
[0039] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition as described herein, wherein at least one chelating agent selected from the group consisting of ethylene diaminetetraacetic acid, nitrilotetraacetic acid, β-alaninediacetic acid, ethylenediaminosuccinic acid, aminotrimethylenephosphoric acid, serinediaacetic acid, asparaginediacetic acid, methylgylcinediacetic acid diethylenetriamine pentaacetic acid, nitrilotriacetic acid, cyclohexanediamine tetraacetic acid, triethanolamineethylenediamine tetraacetic acid, ethylenetriamine pentaacetic acid, tetraethylenetriamine, ethylenediamine diethyltriamine, and combinations thereof.
[0040] In an embodiment of the present disclosure, there is provided a process for preparation of a cleansing composition as described herein, wherein chelating agent is ethylene diaminetetraacetic acid.

[0041] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein at least one
emollient selected from the group consisting of ethylene glycol distearate, mineral
oil, glyceryl stearate, isopropyl palmitate, glycol distearate, shea butter, and
combinations thereof.
[0042] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein emollient is
ethylene glycol distearate.
[0043] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein at least one
diluent is selected from the group consisting of aqueous diluent, alcoholic diluent,
and combinations thereof.
[0044] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein diluent is
aqueous diluent.
[0045] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein aqueous
diluent is water.
[0046] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein at least one
humectant is selected from the group consisting of glycerin, propylene glycol, PEG
400, sorbitol, sucrose, and combinations thereof.
[0047] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein humectant is
selected from the group consisting of glycerin, PEG 400, and combinations thereof.
[0048] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein at least one
preservative is selected from the group consisting of methylchloroisothiazolinone
(and) methylisothiazolinone, 1,3-dihydroxymethyl-5,5 dimethylhydantoin (DMDM
hydantoin), phenoxyethanol, parabens, and combinations thereof;

[0049] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein preservative is
methylchloroisothiazolinone (and) methylisothiazolinone, 1,3-dihydroxymethyl-5,5
dimethylhydantoin (DMDM hydantoin).
[0050] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein at least one
solubilizer is selected from the group consisting of PEG 400, PEG-40
hydrogenated castor oil, polysorbates, and combinations thereof.
[0051] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein solubilizer is
PEG-40 hydrogenated castor oil.
[0052] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein at least one
anti-oxidant is selected from the group consisting of butylated hydroxyltoluene,
tocopheryl acetate, and combinations thereof.
[0053] In an embodiment of the present disclosure, there is provided a process for
preparation of a cleansing composition as described herein, wherein anti-oxidant is
butylated hydroxyltoluene (BHT).
[0054] In an embodiment of the present disclosure, there is provided a stable
cleansing composition having viscosity in the range of 2000 to 4000 cps and pH in
the range of 3.5-4.8, obtained by the process as described herein comprising: (a)
citric acid; (b) sodium chloride; (c) at least one surfactant; (d) at least one chelating
agent; (e) at least one emollient; (f) at least one humectant; (g) at least one
preservative; (h) at least one solubilizer; (i) at least one antioxidant; and (j) at least
one diluent.
[0055] In an embodiment of the present disclosure, there is provided a stable
cleansing composition having viscosity in the range of 2000 to 4000 cps and pH in
the range of 3.5-4.8, obtained by the process as described herein comprising: (a)
citric acid having weight percentage in the range of 0.1 to 2% with respect to the
composition; (b) sodium chloride having weight percentage in the range of 0.01-3
% with respect to the composition; (c) at least one surfactant having weight

percentage in the range of 0.01-10 % with respect to the composition (d) at least one chelating agent having weight percentage in the range of 0.01-1 % with respect to the composition; (e) at least one emollient having weight percentage in the range of 0.01-2 % with respect to the composition; (f) at least one humectant having weight percentage in the range of 0.01-1 % with respect to the composition; (g) at least one preservative having weight percentage in the range of 0.01-1 % with respect to the composition; (h) at least one solubilizer having weight percentage in the range of 0.01-5 % with respect to the composition; (i) at least one antioxidant having weight percentage in the range of 0.01-1 % with respect to the composition; and (j) at least one diluent having weight percentage in the range of qs-100% with respect to the composition.
[0056] In an embodiment of the present disclosure, there is provided a stable cleansing composition having viscosity in the range of 2000 to 4000 cps and pH in the range of 3.5-4.8, obtained by the process as described herein comprising: (a) citric acid having weight percentage in the range of 0.1 to 2% with respect to the composition; (b) sodium chloride having weight percentage in the range of 0.05-1 % with respect to the composition; and (c) at least one surfactant having weight percentage in the range of 1-10 % with respect to the composition.
[0057] In an embodiment of the present disclosure, there is provided a stable cleansing composition having viscosity in the range of 2000 to 4000 cps and pH in the range of 3.5-4.8, obtained by the process as described herein comprising: (a) citric acid having weight percentage in the range of 0.1 to 2% with respect to the composition; (b) sodium chloride having weight percentage in the range of 0.05-1 % with respect to the composition; (c) at least one surfactant having weight percentage in the range of 1-10 % with respect to the composition; (d) at least one chelating agent having weight percentage in the range of 0.01-0.8 % with respect to the composition; (e) at least one emollient having weight percentage in the range of 0.1-2 % with respect to the composition; (f) at least one humectant having weight percentage in the range of 0.05-1.0 % with respect to the composition; (g) at least one preservative having weight percentage in the range of 0.05-1.0 % with respect to the composition; (h) at least one solubilizer having weight percentage in the

range of 0.05-3 % with respect to the composition; (i) at least one antioxidant having weight percentage in the range of 0.01-1 % with respect to the composition; and (j) at least one diluent having weight percentage in the range of qs-100% with respect to the composition.
[0058] In an embodiment of the present disclosure, there is provided a stable cleansing composition having viscosity in the range of 2000 to 4000 cps and pH in the range of 3.5-4.8, obtained by the process as described herein comprising: (a) citric acid having weight percentage in the range of 0.4 to 2% with respect to the composition; (b) sodium chloride having weight percentage of 0.2 % with respect to the composition; (c) cocamide monoethanolamine (cocamide MEA) having weight percentage of 1 % with respect to the composition (d) disodium laureth sulfosuccinate having weight percentage of 2.527 % with respect to the composition at least one chelating agent having weight percentage in the range of 0.01-1 % with respect to the composition; (e) cocamidopropyl betaine having weight percentage in the range of 2.436 % with respect to the composition; (f) sodium laureth ether sulphate having weight percentage of 3.871 % with respect to the composition; (g) ethylene diaminetetraacetic acid having weight percentage of 0.05 % with respect to the composition; (h) ethylene glycol distearate having weight percentage of 0.8 % with respect to the composition; (i) glycerin having weight percentage of 0.1 % with respect to the composition; (g) methylchloroisothiazolinone (and) methylisothiazolinone, 1,3-dihydroxymethyl-5,5 dimethylhydantoin (DMDM hydantoin) having weight percentage of 0.3 % with respect to the composition; (h) PEG-40 hydrogenated castor oil having weight percentage of 0.2 % with respect to the composition; (i) butylated hydroxyltoluene (BHT) having weight percentage of 0.05 % with respect to the composition; and (j) at least one diluent having weight percentage in the range of qs-100% with respect to the composition.
[0059] Although the subject matter has been described in considerable detail with reference to certain preferred embodiments thereof, other embodiments are possible.
EXAMPLES

[0060] The disclosure will now be illustrated with working examples, which is intended to illustrate the working of disclosure and not intended to take restrictively to imply any limitations on the scope of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this disclosure belongs. Although methods and materials similar or equivalent to those described herein can be used in the practice of the disclosed methods and compositions, the exemplary methods, devices and materials are described herein. It is to be understood that this disclosure is not limited to particular methods, and experimental conditions described, as such methods and conditions may apply.
Example 1
Process for the preparation of stable cleansing composition:
[0061] The main task of a viscosity enhancer or thickener for a surfactant composition is of course to the increase the viscosity. However, in order to have a successful cleansing composition the consumer perception is also important. The present disclosure is thus, focused on adjusting the pH of the cleansing composition in order to make it mild to skin. After various preliminary experimentation the following process comprising of the components as provided in Table 1, a stable cleansing composition (A) was achieved, which had a desired viscosity of 3000 cps.
[0062] The stable cleansing composition was prepared as follows: Cocamide monoethanolamine, ethylenediamine tetraacetic acid, ethyleneglycol distearate, and water were added into a reaction vessel to obtain an initial mixture. The initial mixture was stirred while maintaining a temperature in the range of 70 °C to 80 °C. After complete melting, sodium laureth ether sulphate was added to the reaction mass while maintaining the temperature at 80 °C. Further, disodium laureth sulfosuccinate and cocamidopropyl betaine were added at a temperature of about 75 °C and allowed to mix for about 10 minutes. Glycerin, PEG-400, DMDM hydantoin, butylated hydroxytoluene, and PEG-40 hydrogenated castor oil were further added at a temperature in the range of 40-50 °C to obtain a mixture. After complete addition and mixing citric acid was added to the mixture at a temperature

in the range of 40 to 80 °C for a period in the range of 5-60 minutes at a stirring speed in the range of 20 to 50 rpm to bring down the pH to 3.5 to 4.8 to obtain first mixture, followed by addition of sodium chloride chloride at a temperature in the range of 25-45 °C for a period in the range of 5-45 minutes at a stirring speed in the range of 10 to 50 rpm to obtain the cleansing composition having viscosity in the range of 2200-4000 cps.
[0063] Table 1 shows comparison of the cleansing compositions prepared using two different processes. Composition A was prepared exactly according to the procedure of Example 1, whereas Composition B was prepared by a process which was for a major part identical to Example 1, except that the sequence of addition of citric acid and salt was reversed.

Example 2
[0064] Certain modifications in the process for preparation of a cleansing
composition (hand wash) were tried before arriving at the process disclosed in the
present disclosure, and is exemplified in composition B. Parameter that was found
to be critical for the process of preparation cleansing composition (hand wash) was
the sequence of addition of citric acid and sodium chloride to the composition.
Addition of sodium chloride, post the addition of citric acid resulted in an increase
of viscosity of the cleansing composition, thus the desired viscosity without
separation was achieved. This also provided an advantage of reducing the amount
sodium chloride which was required to build the viscosity.
[0065] However, any change in the sequence of addition of citric acid and sodium
chloride resulted into a product which was found to be unstable as a result of phase
separation and thinning.
[0066] In order to ascertain the efficacy of the method of the instant disclosure, an
identical composition was prepared wherein the components were in the working
range as mentioned in Table 1, by deviating from the manner of addition of citric
acid and sodium chloride as exemplified in composition B.
[0067] During the preparation of the cleansing composition (B; hand wash)
despite, maintaining the components in the working range, it was observed that

when citric acid was added post addition of sodium chloride there a considerable drop in viscosity which further led to separation of product, thereby making product non-acceptable.
[0068] Overall, based on the disclosures above, it can be appreciated that critical elements of the process of preparation of a cleansing composition are based on manner of addition of citric acid and viscosity modifier (sodium chloride), so as to achieve a mild cleansing composition without affecting the viscosity. The process of the instant disclosure is advantageous for the reason that it achieves mild and stable cleansing composition.

I/We Claim:
1. A process for preparation of a cleansing composition comprising steps of:
(i) contacting at least one surfactant with citric acid to obtain a first
mixture; and
(ii) contacting the first mixture with sodium chloride to obtain the
cleansing composition,
wherein said cleansing composition is stable and exhibits viscosity in the range of 2000 to 4000cps.
2. The process as claimed in claim 1, wherein the surfactant is selected from the group consisting of cocamide monoethanolamine (cocamide MEA), disodium laureth sulfosuccinate, cocamidopropyl betaine, sodium laureth ether sulphate, PEG-40 hydrogenated castor oil, and combinations thereof.
3. The process as claimed in claim 1, wherein the at least one surfactant is contacted with citric acid at a temperature in the range of 40-80 °C for a period in the range of 5–60 minutes at a stirring speed in the range of 20 to 100 rpm.
4. The process as claimed in claim 1, wherein the first mixture is contacted with the sodium chloride at a temperature in the range of 25- 45°C for a period in the range of 5-45 minutes at a stirring speed in the range of 10-50 rpm.
5. A process for preparation of a cleansing composition comprising steps of: (i) contacting at least one surfactant with at least one chelating agent, at
least one emollient, and at least one diluent to obtain an initial
mixture;
(ii) contacting the initial mixture with at least one component selected
from the group consisting of at least one humectant, at least one
preservative, at least one antioxidant, at least one solubilizer, and
combinations thereof to obtain a mixture;
(iii) contacting the mixture with citric acid to obtain a first mixture; and
(iv) contacting the first mixture with sodium chloride to obtain the
cleansing composition.

6. The process as claimed in claim 5, wherein the surfactant is contacted with at least one chelating agent, at least one emollient, and at least one diluent at a temperature in the range of 65-80 °C for a period in the range of 5-30 minutes at a stirring speed in the range of 20-100 rpm; the initial mixture is contacted with at least one component selected from the group consisting of at least one humectant, at least one preservative, at least one antioxidant, at least one solubilizer, at a temperature in the range of 20-70 °C for a period in the range of 5-60 minutes at a stirring speed in the range of 20-50 rpm; the mixture is contacted with citric acid to obtain a first mixture at a temperature in the range of 40 to 80 °C for a period in the range of 5-60 minutes at a stirring speed in the range of 20 to 100 rpm, and the first mixture is contacted with sodium chloride at a temperature in the range of 25-45 °C for a period in the range of 5-45 minutes at a stirring speed in the range of 10 to 50 rpm to obtain the cleansing composition.
7. The process as claimed in claim 5, wherein the first mixture and the cleansing composition has a pH in the range of 3.5-4.8.
8. The process as claimed in claim 5, wherein the cleansing composition has a viscosity in the range of 2000-4000 cps.
9. The process as claimed in claim 5, wherein the at least one chelating agent is selected from the group consisting of ethylene diaminetetraacetic acid, nitrilotetraacetic acid, β-alaninediacetic acid, ethylenediaminosuccinic acid, aminotrimethylenephosphoric acid, serinediaacetic acid, asparaginediacetic acid, methylgylcinediacetic acid diethylenetriamine pentaacetic acid, nitrilotriacetic acid, cyclohexanediamine tetraacetic acid, triethanolamineethylenediamine tetraacetic acid, ethylenetriamine pentaacetic acid, tetraethylenetriamine, ethylenediamine diethyltriamine, and combinations thereof; the at least one emollient is selected from the group consisting of glycol distearate, mineral oil, glyceryl stearate, isopropyl palmitate, glycol distearate, shea butter, and combinations thereof; the at least one diluent is selected from the group consisting of aqueous diluent, alcoholic diluent, and combinations thereof; the at least

one humectant is selected from the group consisting of glycerin, propylene
glycol, PEG 400, sorbitol, sucrose, and combinations thereof; the at least
one preservative is selected from the group consisting of
methylchloroisothiazolinone (and) methylisothiazolinone, 1,3-
dihydroxymethyl-5,5 dimethylhydantoin (DMDM hydantoin),
phenoxyethanol, parabens and combinations thereof; the at least one anti-oxidant is selected from the group consisting of butylated hydroxyltoluene, tocopheryl acetate, and combinations thereof; the at least one solubilizer is selected from the group consisting of PEG 400, PEG-40 hydrogenated castor oil, polysorbates, and combinations thereof.
10. A stable cleansing composition having viscosity in the range of 2000 to 4000 cps and pH of 3.5-4.8 obtained by the process as claimed in any of the claims 1-9 comprising (a) citric acid having weight percentage in the range of 0.1 to 2% with respect to the composition; (b) sodium chloride having weight percentage in the range of 0.01-3 % with respect to the composition; and (c) at least one surfactant having weight percentage in the range of 0.01-10 % with respect to the composition.
11. The stable cleansing composition as claimed in claim 10 further comprises:(a) at least one chelating agent having weight percentage in the range of 0.01-1 % with respect to the composition; (b) at least one emollient having weight percentage in the range of 0.01-2 % with respect to the composition; (c) at least one humectant having weight percentage in the range of 0.01-1 % with respect to the composition; (d) at least one preservative having weight percentage in the range of 0.01-1 % with respect to the composition; (e) at least one solubilizer having weight percentage in the range of 0.01-5 % with respect to the composition; (f) at least one antioxidant having weight percentage in the range of 0.01-1 % with respect

to the composition; and (g) at least one diluent having weight percentage in the range of qs-100% with respect to the composition.