STATEMENT OF INVENTION:
The present invention discloses the simple formulation of Chlorine and Sulphur free multipurpose liquid cleaning agent. Cleaning agents in the form of liquids, powders, sprays, granules are used to remove dirt, stains, bad smells and clutter on the surface of glass, screen, floor surface, toilet pans, cloths and many other home appliances. Purpose of cleaning agents includes health, beauty, absence of offensive odor, avoidance of spreading contaminants to on self and others. In these present scenarios, most of the cleaning agents are synthesized using chlorine containing chemicals as the primary bleaching agent which is corrosive, poisonous, environmental hazardous. Besides the above, it has other effects on the natural habitat. Our current formulation contains no chlorine, Sulphur or related products and cleans more effectively than the existing products. The important ingredients of the formulation include Hydroxyapatite, Hydrogen Peroxide, Acetic Acid, Sodium Gluconate, Ethoxylated Alcohol, Sodium Pyrophosphate and Extran. It not only cleans the floors, toilet pans, wash basin, ceramic materials and polymers surface but is also environmental friendly.
2. BACKGROUND OF INVENTION:
The present stain removers used various modified versions of chlorine based formulations. The patent US 8673297 B2 uses a chlorine dioxide based cleansing formulae whereas patent, US 5215676 A, states the usage of hydrochloric acid based formulation. The adverse environmental and health effect of led to its substitution in further stain remover products. The required goal has not yet been achieved. Day by day the environmental requirements are motivating the society to use non-hazardous chemicals for cleaning purpose.
In the year 1997, one formulation had been proposed to remove stain by US Pat. No US5885954 A. The formulation included calcium hypochlorite; a surfactant to promote detergency by emulsification, such as sodium dodecylbenzene sulfonate and a polyacrylic acid salt, such as sodium polyacrylate, to further promote cleaning by chelation. The stain remover formulation was applied to the stained surface by spraying, rolling or brushing. The US Patent US20130192006 A1 discusses, the formation of an acid-surfactant-based composition that was used to remove CHG (chlorhexidine

gluconate) from a textile that has not been exposed to chlorine subsequent to being exposed to CHG. Another patent EP0421738 A2 in 1991 discloses a formulation of stable thickened liquid cleaning composition containing chlorine based bleaching agent, cross-linked polycarboxylate polymer, a rheology stabilizing agent, and a buffering agent to maintain the pH of the composition around 10,
The US3811833 A introduces cone. Hydrogen peroxide as the bleaching agent stabilized by a stannate salt along with organic acids for stabilizing and increasing the efficiency. Similarly, EP0605178 A2 uses an alkaline aqueous Hydrogen Peroxide solution thickened by a mixture of a quarternary long chain alkyl ammonium compound together with a salt of sulphonic acid.
The patents, US5904734 A and US5739096 A, had used Hydrogen peroxide with an activator such as, tungsten and cyanopyridine N-oxide respectively. One of the recent patent, US8962738 B2, states about stain-eating coatings which uses hydrogen peroxide, hypochlorite, organic peroxides, organo-chlorine as the oxidizing agent. However, an efficient and cost effective formulation as multipurpose cleaning agent free from chlorine and sulphur has not been proposed in spite of great potential existing for chlorine free compositions. Besides, the use of extran as a surfactant and cleansing enhancer has not been used is stain removers til! date. Therefore, development of ecofriendly and economic formulation for the multipurpose cleaning agent is essential and there is huge potential in future.
3. OBJECT OF THE INVENTION:
The present invention is a liquid formulation void of chlorine and sulphur which exhibits both bleaching and detergency properties. The basic formulation includes Hydrogen Peroxide as primary bleaching agent, Sodium Gluconate and Sodium Pyrophosphate as stabilizing agent.for hydrogen peroxide, and extran as nonionic stable surfactant to promote detergency by emulsification. The formulation also includes Hydroxyapatite, which helps brighten the applied surface, and 1 M Glacial acetic acid, which acts as a solvent to dissolve the Hydroxyapatite for better homogenization of the constituent. Ethoxylated Alcohol is added to make the composition more stable and enhance the cleaning efficiency.

Accordingly, the objective of the present invention is to provide a novel biodegradable,
nontoxic and multipurpose cleaning agent formulation for removing water stains,
tobacco, soot, mold, mildew, and other stains from textured ceilings, walls, tiles,
masonry, grout, fiberglass and plastic patio furniture and to remove excess amount of
residual chlorine from surfaces.
Another objective of the invention is to provide a novel multipurpose cleaning agent
formulation which may simply be sprayed, brushed or rolled onto the desired surface
along with a gentle rub or wipe.
The most signiftcant objective of the invention is to provide a novel formulation that
substitute the main bleaching agent chlorine, found in most of the recent available
formulations for cleaning purposes.
4. SUMMARY OF INVENTION:
In order to overcome the toxic and corrosive effect of chlorine and sulphur on-natural habitat, several attempts have been made to substitute both from cleaning products. The hydrogen peroxide is used as the main bleaching agent which has both oxidizing as well as reducing property. But it is known that hydrogen peroxide is not stable in ambient conditions. So, in order to stabilize it and to increase its cleaning efficiency, sodium gluconate and sodium pyrophosphate are being added as required to the solution. The cleaning agent developed is in a solution form. Here Hydroxyapatite (HAP) is being used as a brightening agent and to make it soluble glacial acetic acid is used as solvent. The solution contains Extran and Ethoxylated alcohol which acts as a surfactant that emulsifies and enhances the cleaning quality. To the mixture, water is added and the solution's PH value is maintained within 3 - 3.5 range.
5. BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS .
Figure I depicts the cleaning effect of the prepared solution on a stained tile surface
Fig 1: Stained tile surface
Fig 2: Cleaned tile surface after applying the formulation. Figure II depicts the cleaning effect of the prepared solution on a stained glass surface
Fig 3: Stained glass surface

Fig 4: Cleaned glass surface after applying the formulation.
6. DETAILED DESCRIPTION
The cleaning agent formulation of the present invention is a liquid mixture containing: hydrogen peroxide which acts as an oxidant or reductant depending on the nature of dirt or stain; Sodium Gluconate and Sodium Pyrophosphate, as hydrogen peroxide stabilizers; extran, as water soluble nonionic surfactant; and various additives like Hydroxyapatite as brightener, and Ethoxylated Alcohol to further promote detergency. Glacial acetic acid is added to maintain the pH AT 3.5 and to solubilize the hydroxyapatite. The liquid mixture is prepared in a separate vessel to yield a homogenous composition and kept in a container. The amount of the ingredients is chosen to give the desired level of bleaching, detergency and stability in the final composition. The amounts may be varied generally within small limits. However, the amount of hydrogen peroxide will usually not exceed about 5% by weight of the final product for general household use, and will be in the range of about 3-8 weight percent, the surfactant in the range of about 0.1-10 weight percent and the water soluble anionic polymer in the range of about 0.1-10 weight percent.
In a typical synthesis, commercially available Hydroxyapatite was dissolved in warm glacial acetic acid under stirring. Then ethoxylated alcohol was added into it. Hydrogen peroxide which .was stabilized by Sodium Gluconate and Sodium Pyrophosphate was added to the previous solution. Then appropriate amount of water and extran was added. The pH of the solution was maintained at 3.5.
The final solution, which is preferably sprayed onto the desired surface, is mixed with water at a concentration range of about 3-8 weight percent. As indicated, the stain remover formulation is applied to the stained surface by spraying, rolling or brushing. In this manner, water stains, tobacco, soot, mold, mildew and other stains are readily removed from the targeted surfaces, such as textured walls and ceilings, tiles, masonry, plastic and fiberglass and plastic patio furniture. Importantly, this is done without any further need to rub or wipe the surface.

The above surfactants form micelle agents, which promote detergency through a process called "emulsification," particularly for stains which typically do not dissolve in water, such stains either oil based or having an affinity for oil. These so-called "micelle agents" contain molecules having an affinity for water as well as molecules having an affinity for oil. In emulsification, the stain is surrounded by the micelle agents which have an affinity, oil oriented towards the stain. Those molecules having an affinity for water, however, are oriented towards water and, it is through this emulsification of the stain that the stain removal properties are primarily enhanced. Additionally, such surface active agents lower the surface tension of the stained surface to further enhance the stain removal properties. The above solution also works as a disinfectant as it reacts very fast. It will disintegrate into hydrogen and water, without the formation of byproducts. This increases the amount of oxygen in water due to which it has been widely used-to prevent the formation of colors, tastes, corrosion and scaling by pollution degradation (iron, manganese, sulphates) and micro-organism degradation. Pollutions are decomposed by free oxygen radicals, and only water remains. Free radicals have both oxidizing and disinfecting abilities. Hydrogen peroxide eliminates microbes through oxidation. It also helps remove residual chlorine from the surfaces, thereby making it useful in cleaning walls of water tanks, pipes, and swimming pools.
EXAMPLE 1
A clean and dry 100 ml glass beaker (1) was taken, 40 mg of Hydroxyapatite which was obtained from Sigma-Aldrich was taken in it without any further purifications. 5ml of glacial acetic acid was added to it drop-wise under vigorous stirring and then the solution was slightly warmed. In another clean and dry 100 ml beaker (2), 4 ml of ethoxylated alcohol was taken, 2 g of Sodium gluconate was added to it and stirred vigorously.for 10.minutes..To the above solution, 1 g of Sodium pyrophosphate was added. In another 250 ml beaker (3), 55 ml water was taken and 10 ml of extran was added to it drop-wise. After keeping the solution steady for 10 minutes, 10 ml of Hydrogen peroxide whichwas obtained from Sigma-Aldrich 30% (v/v) used without any further purifications was added drop-wise. The contents in beaker (1) was added to beaker (3) followed by the contents in beaker (2). The pH of the solution was

maintained at 3.5 by adding requisite amount of glacial acetic acid or extran and the volume was made up to 100 ml. The sample was stirred for 30 minutes and then kept in a cool dry place for 24 hours. After the designated time period, the contents in beaker (2) were used to remove stain.
The above solution was applied to a stained glass surface. After 5 minutes the surface was wiped with tissue paper, the surface was totally clean and not tarnished. The solution had a complete cleaning effect without causing any adverse effects on the surface.
EXAMPLE-2
A clean and dry 100ml glass beaker (1) was taken, 100 mg of Hydroxyapatite which was obtained from Sigma-Aldrich was taken in it without any further purifications. 5ml of glacial acetic acid was added to it drop-wise under vigorous stirring. In another clean and dry 100 ml beaker (2), 4 ml of ethoxylated alcohol was taken. 3 g of Sodium gluconate was added to it and stirred vigorously for 10 minutes. In another 250 ml beaker (3), 65 ml water was taken and 5 ml of extran was added to it drop wise. After keeping the solution steady for 10 minutes, 5 ml of Hydrogen peroxide was added drop wise. The contents in beaker (1) was added to beaker (3) followed by the contents in beaker (2).
The pH of the solution was maintained at 3.5 and volume was made up to 100ml. The solution was stirred for 30 minutes and then kept in a cool dry place for 24 hours. After 5 minutes, the contents in beaker (2) were used to remove stain from a glass surface. The surface contained few pecks of stain but was not tarnished. The solution's cleaning efficiency deteriorated significantly but nevertheless did not cause any adverse effect on the surface.
EXAMPLE-3
A clean, and dry 100 ml glass beaker (1) was taken, 100 mg of Hydroxyapatite which was obtained from Sigma-Aldrich was taken in it without any further purifications. 5ml of glacial acetic acid was added to it drop wise under vigorous stirring. In another clean and dry 100 ml beaker (2), 4 ml of ethoxylated alcohol was taken. To the above

solution, 3 g of Sodium pyrophosphate was added. In another 250 ml beaker (3), 65 ml water was taken and 5 ml of extran was added to it drop-wise. After keeping the solution steady for 10 minutes, 5 ml of Hydrogen peroxide was added drop-wise. The contents in beaker (1) was added to beaker (3) followed by the contents in beaker (2). The pH of the solution was maintained at 3.5. The sample was stirred for 30 minutes and then kept in a cool dry place for 24 hours. After the designated time period, the contents in beaker (2) were used to remove stain from a glass surface. The surface contained spots of stain and was also tarnished. Not only the solution's cleaning efficiency deteriorated significantly but also it had adverse effect on the surface.
EXAMPLE-4
A clean and dry 100ml glass beaker (1) was taken, 100 mg of Hydroxyapatite which was obtained from Sigma-Aldrich was taken in it without any further purifications. 5ml of glacial acetic acid was added to it drop-wise under vigorous stirring. In another clean and dry 100 ml beaker (2), 4 ml of ethoxylated alcohol was taken. 2 g of Sodium gluconate was added to it and stirred vigorously for 10 minutes. To the above solution, 1 gm of Sodium pyrophosphate was added. In another 250 ml beaker (3), 65 ml water was taken and 5 ml of extran was added to it drop-wise. After keeping the solution steady for 10 minutes, 8 ml of Hydrogen peroxide was added drop-wise. The contents in
*
beaker (1) was added to beaker (3) followed by the contents in beaker (2). The pH of the solution was maintained at 3.5. The sample was stirred for 30 minutes and then kept in a cool dry place for 24 hours. After the designated time period, the contents in beaker (2) were used to remove stain from a glass surface. After 5 minutes from the application of the solution on the stained glass surface, the surface was wiped with a tissue paper, the surface was totally clean and tarnished. The solution had a complete cleaning effect as well as harsh adverse effects on the surface.
EXAMPLE-5
A clean and dry 100 ml glass beaker (1) was taken, 100mg of Hydroxyapatite which was obtained from Sigma-Aldrich was taken in it without any further purifications. 5ml of glacial acetic acid was added to it drop-wise under vigorous stirring. In another clean

and dry 100 ml beaker (2), 4 ml of ethoxylated alcohol was taken. 2 g of Sodium gluconate was added to it and stirred vigorously for 10 minutes. To the above solution, 1 gm of Sodium pyrophosphate was added. In another 250 ml beaker (3), 65 ml water was taken and 10 ml of extran was added to it drop-wise. After keeping the solution steady for 10 minutes, 5 ml of Hydrogen peroxide was added drop-wise. The contents in beaker (1) was added to beaker (3) followed by the contents in beaker (2). The pH of the solution was maintained at 3.5. The sample was stirred for 30 minutes and then kept in a cool dry place for 24 hours. After the designated time period, the contents in beaker (2) were used to remove stain. The surface did not contain any stain but the excess foam due increased level of extran in the solution left the surface tarnished. It had adverse effect on the surface.
So, the solution developed in Example-1 was by far the best cleaning agent which cleaned the surface completely without causing any adverse effects on the surface.

WE CLAIM:
1. A multipurpose cleaning agent which containes hydrogen peroxide as the main cleaning agent
which is stabilized by sodium gluconate and sodium pyrophosphate..
Further it contains hydroxyapatite as brightening agent and acetic acid is used to dissolve the hydroxyapatite and to maintain the pH at 3.5.
Extran in required quantity is added to enhance the detergency by emulsification.
Ethoxyiated Alcohol is added to make the composition more stable by better homogenization of the constituent and enhance the cleaning efficiency.
The stain or dirt present on the surface is removed either by oxidizing or reducing action.
2. The formulation as in claim 1, it effectively cleans "ceramic tiles, cement floor, table, glass, toilet pans , polymer surfaces and removes residual chlorine..
3. The formulation as in claim 1 is completely biodegradable, nontoxic and ecofriendly as it does not contains any chlorine, sulphur or chlorine and sulphur containing compounds.
4. The formulation as in claim 1, there is no residue left on the surface after cleaning without damaging or tarnishing the color of the surface.
5. The formulation as in claim 1 can be used for removal of residual chlorine from various surfaces.
.6. The formulation as in claim 1 is stable up to a temperature of 60°C and works with same
efficiency for a period of 90 days.