Method of Producing Rebaudioside D Sweetened Diet Carbonated Soft Drinks
Cross-Reference to Related Applications
[001] The present application claims priority to U.S. Serial No. 61/624,439, filed April 16,
2012, and entitled "Method of Producing Rebaudioside D Sweetened Carbonated Soft
Drinks" hereby incorporated by reference in its entirety.
Field Of Invention
[002] The present invention is directed to a method of producing diet carbonated soft drinks
sweetened with Rebaudioside D.
Background
[003] Sweet steviol glycoside compounds are present in small concentrations and can be
extracted from plant materials, particularly the leaves of the Stevia rebaudiana Bertoni
plant. In a crude stevia extract these compounds typically are found to include
stevioside, steviolbioside, several Rebaudiosides, including Rebaudioside A,
Rebaudioside B, Rebaudioside C, Rebaudioside D, and Rebaudioside E, and
Dulcoside compounds. For convenience, the Rebaudiosides may be referred to here
as Reb A, Reb B, Reb C, etc.
[004] Of the rebaudiosides, Reb A is commonly used as sweetener in beverage applications,
but has off-taste issues. Reb D has a better sugar character and more desirable taste
than Reb A, but Reb D is difficult to use in beverage products because of its low
solubility in water at room temperature. For instance, Reb D needs to be heated to
near boiling water temperature for 2 hours in order to achieve complete dissolution.
See US Publication 20110189360, for example. In room temperature, at most about
500 ppm can be solubilized in water.
[005] Reb D has a sweetness potency similar to that of Reb A (about 200 times sweeter than
sugar). As such, with about 500 ppm water solubility, Reb D can provide decent
sweetness to the beverage. However, this solubility poses a problem for making a
carbonated soft drink employing Reb D as a primary sweetener.
[006] Traditional processes for making carbonated soft drinks (CSDs) require a 6 folds
concentration of ingredients in a concentrate or syrup. This syrup is then diluted by 5
folds of water and injected with C0 2 to form the CSD (cola, lemon-lime, etc.). This
works fine if all syrup ingredients are soluble in water to the extent of 6 folds of the
level in the finished beverage. In other word, if Reb D is the primary sweetener of a
CSD, its water solubility needs to be 3000 ppm if the finished beverage is formulated
with 500 ppm of Reb D. US Publication 201 10189360 teaches heating to near
boiling, but this is not practical as the beverage bottler does not like to conduct such
high temperature heating. Moroever, upon cooling Reb D may precipitate down from
the super-saturated solution within a few hours.
[007] Accordingly, it is an object of some aspects of the present invention to provide a
method of making a diet CSD sweetened with low solubility sweeteners such as Reb
D. Additional objects and advantages of all or certain embodiments of the systems
and methods disclosed here will be apparent to those skilled in the art given the
benefit of the following disclosure and discussion of certain exemplary embodiments.
Summary
[008] The present invention relates to a method of making a diet carbonated soft drink
(CSD) sweetened with Reb D as the primary sweetener. The present invention
utilizes unsweetened syrup and Reb D sweetened water.
Brief Description of the Drawings
[009] Fig. 1 is a flow chart depicting one aspect of the method of the invention.
[010] Fig. 2 is a flow chart depicting another aspect of the method of the invention.
Detailed Description
[011] Various examples and embodiments of the inventive subject matter disclosed here are
possible and will be apparent to the person of ordinary skill in the art, given the
benefit of this disclosure. In this disclosure reference to "some embodiments,"
"certain embodiments," "certain exemplary embodiments" and similar phrases each
means that those embodiments are merely non-limiting examples of the inventive
subject matter, and there are alternative embodiments which are not excluded. Unless
otherwise indicated or unless otherwise clear from the context in which it is described,
alternative and optional elements or features in any of the disclosed embodiments and
examples are interchangeable with each other. That is, an element described in one
embodiment or example should be understood to be interchangeable or substitutable
for one or more corresponding but different elements in another described example or
embodiment and, likewise, an optional feature of one embodiment or example may
optionally also be used in other embodiments and examples. More generally, the
elements and features of any disclosed example or embodiment should be understood
to be disclosed generally for use with other aspects and other examples and
embodiments. A reference to a component or ingredient being operative or
configured to perform one or more specified functions, tasks and or operations or the
like, is intended to mean that it can perform such function(s), task(s) and/or
operations) in at least certain embodiments, and may well be able to perform also one
or more other functions, tasks and/or operations.
[012] In accordance with aspects of the invention, Reb D is employed as the primary
sweetener in diet CSDs. Diet CSDs are defined as beverages having 40 or fewer
calories per serving (8 ounces). If the calories per serving is less than 5 calories, the
CSDs can be defined as zero calories beverages.
[013] Large quantities of carbonated beverages are typically not prepared in large quantity
batches. Instead water is injected with carbon dioxide. The carbonated water and
sweetened syrup are then injected simultaneously into containers such as bottles or
cans to form the CSD. The container is quickly sealed. Alternatively, sweetened
syrup and water are combined and then injected with carbon dioxide at the time of
bottling of the beverage to form the CSD. The container is quickly sealed.
[014] Traditionally one part syrup is combined with five parts water. The syrup is a
concentrate and the ingredients must be soluble in this concentrate. For example, a
typical sweetener in diet carbonated beverages is aspartame. The aspartame must be
soluble in the syrup up to 3000 ppm in order to provide the desired sweetness value of
500 ppm when diluted with water. Other sweeteners including Reb A may be used in
the syrup. These sweeteners have acceptable solubility in water.
[015] Reb D and other poorly soluble natural sweeteners cannot be used as primary
sweeteners in the CSD due to their poor solubility in the syrup. That is, one cannot
obtain the desired concentration (6 folds of the dosage in the finished beverage) of
Reb D in the syrup to obtain a diet beverage where Reb D is the desired sweetener.
The present invention solves this problem by dissolving the Reb D in the water source
instead of the syrup.
[016] Hence in one aspect as shown in Fig. 1, Reb D (10) is combined with water (12) to
produce Reb D sweetened water (14). The Reb D sweetened water may be held in
water storage tank. The Reb D sweetened water is injected with carbon dioxide (16)
to produce carbonated Reb D sweetened water (18). Then the carbonated Reb D
sweetened water (18) is injected into containers (22) simultaneously with
unsweetened syrup (20) to form the diet CSD.
[017] Alternatively, as shown in Fig. 2, Reb D (10) is combined with water (12) to produce
Reb D sweetened water (14). The Reb D sweetened water (14) is mixed with
unsweetened syrup (202) to form sweetened syrup water (24) which is then injected
with carbon dioxide (16) to form diet CSD (26) which is then injected into containers
(22).
[018] The Reb D sweetened water (14) may be held in a water storage tank for a time, but
the remaining steps of adding syrup and carbonation as well as placing in containers
are a continuous process. The containers may be any suitable container such as glass
or plastic bottles or metal cans.
[019] This present invention does not require the 6 fold concentration of Reb D to work
since the Reb D is not being added to the syrup. Instead, Reb D is dissolved in the
water portion of the process. The room temperature solubility of about 500 ppm Reb
D is then sufficient to provide the desired sweetness in the resulting Reb D sweetened
diet CSD.
[020] The Reb D may be obtained from the stevia plant in any suitable manner. For
example, stevia components are extracted from the stevia plant. The extracted
components are subjected to fractionation (column chromatography) to separate
components such as Reb D, Reb A, stevioside, and the like. The Reb D is isolated
and purified by reciystallization, for example.
[021] Water is typically taken from a purified water holding tank. The present invention
simply sweetens the water in the holding tank with a sweetening amount of Reb D.
No heating, other unnecessary ingredients, or high investment is required.
[022] Reb D is added to the water in an amount up to 500 ppm, for example 400 to 500
ppm, 425 to 475 ppm, or 450 ppm. The temperature of the water is typically
maintained at room temperature.
[023] Since Reb D can provide good sweetness at low quantities and lacks the bitter or
metallic aftertastes of artificial sweeteners or natural non-nutritive sweeteners such as
Reb A, it is preferred to use Reb D as a primary sweetener. Other poorly soluble
sweeteners are also contemplated.
[024] The syrup disclosed here may contain a variety of ingredients depending on the
desired properties and tastes of the CSD. For example suitable ingredients include,
but are not limited to, fiavorants, caffeine, caramel and other coloring agents or dyes,
acids, preservatives, antifoaming agents, gums, emulsifiers, tea solids, cloud
components, and mineral and non-mineral nutritional supplements.
[025] Suitable flavorants may be, for example, natural and synthetic fruit flavors, botanical
flavors such as cola and tea, spice flavorings, such as cassia, clove, cinnamon, pepper,
ginger, vanilla spice flavorings, cardamom, coriander, root beer, sassafras, ginseng,
and others.
[026] Suitable acids may be, for example, phosphoric acid, citric acid, malic acid, tartaric
acid, lactic acid, fumaric acid, ascorbic acid, gluconic acid, succinic acid, maleic acid,
adipic acid, cinnamic acid, glutaric acid, and mixtures of any of them.
[027] Examples of non-mineral nutritional supplement ingredients are known to those of
ordinary skill in the art and include, for example, antioxidants and vitamins, including
Vitamins A, D, E (tocopherol), C (ascorbic acid), B (thiamine), B2 (riboflavin), B6,
B 2, and , niacin, folic acid, biotin, and combinations thereof. The optional nonmineral
nutritional supplements are typically present in amounts generally accepted
under good manufacturing practices. Exemplary amounts are between about 1% and
about 100% RDV, where such RDV are established. In certain exemplary
embodiments the non-mineral nutritional supplement ingredient(s) are present in an
amount of from about 5% to about 20% RDV, where established.
[028] Preservatives may be used in at least certain embodiments of the beverages disclosed
here. That is, at least certain exemplary embodiments contain an optional dissolved
preservative system. Solutions with a pH below 4 and especially those below 3
typically are "microstable," i.e., they resist growth of microorganisms, and so are
suitable for longer term storage prior to consumption without the need for further
preservatives. However, an additional preservative system may be used if desired. If
a preservative system is used, it may be added to the beverage product at any suitable
time during production, e.g., in some cases prior to the addition of the sweetener. As
used here, the terms "preservation system" or "preservatives" include all suitable
preservatives approved for use in food and beverage compositions, including, without
limitation, such known chemical preservatives as benzoates, e.g., sodium, calcium,
and potassium benzoate, sorbates, e.g., sodium, calcium, and potassium sorbate,
citrates, e.g., sodium citrate and potassium citrate, polyphosphates, e.g., sodium
hexametaphosphate (SHMP), and mixtures thereof, and antioxidants such as ascorbic
acid, EDTA, BHA, BHT, TBHQ, dehydroacetic acid, dimethyldicarbonate,
ethoxyquin, heptylparaben, and combinations thereof. Preservatives may be used in
amounts not exceeding mandated maximum levels under applicable laws and
regulations. The level of preservative used typically is adjusted according to the
planned final product pH, as well as an evaluation of the microbiological spoilage
potential of the particular beverage formulation. The maximum level employed
typically is about 0.05% by weight of the beverage. It will be within the ability of
those skilled in the art, given the benefit of this disclosure, to select a suitable
preservative or combination of preservatives for beverages according to this
disclosure
[029] The terms "beverage concentrate" and "syrup" may be used interchangeably
throughout this disclosure. At least certain exemplary embodiments of the beverage
syrups contemplated are prepared with an initial volume of water to which the
additional ingredients are added. Full strength beverage compositions may be formed
from the beverage syrups by adding further volumes of water to the syrup. Typically,
for example, full strength beverages may be prepared from the syrups by combining
approximately 1 part concentrate with between approximately 3 to approximately 7
parts water. In certain exemplary embodiments the full strength beverage is prepared
by combining 1 part concentrate with 5 parts water. In certain exemplary
embodiments the additional water used to form the full strength beverages is
carbonated water. In certain other embodiments, a full strength beverage is directly
prepared without the formation of a concentrate and subsequent dilution.
[030] Water is a basic ingredient in the beverage products disclosed here, typically being the
vehicle or primary liquid portion in which the remaining ingredients are dissolved,
emulsified, suspended or dispersed. Purified water can be used in the manufacture of
certain embodiments of the beverages disclosed here, and water of a standard
beverage quality can be employed in order not to adversely affect beverage taste,
odor, or appearance. The water typically will be clear, colorless, free from
objectionable minerals, tastes and odors, free from organic matter, low in alkalinity
and of acceptable microbiological quality based on industry and government
standards applicable at the time of producing the beverage. In certain typical
embodiments, water is present at a level of from about 80% to about 99.9% by weight
of the beverage. In at least certain exemplary embodiments the water used in
beverages and concentrates disclosed here is "treated water," which refers to water
that has been treated to reduce the total dissolved solids of the water prior to optional
supplementation, e.g., with calcium as disclosed in U.S. Patent No. 7,052,725.
Methods of producing treated water are known to those of ordinary skill in the art and
include deionization, distillation, filtration and reverse osmosis ("r-o"), among others.
The terms "treated water," "purified water,", "demineralized water," "distilled water,"
and "r-o water" are understood to be generally synonymous in this discussion,
referring to water from which substantially all mineral content has been removed,
typically containing no more than about 500 ppm total dissolved solids, e.g. 250 ppm
total dissolved solids.
[031] Carbon dioxide is used to provide effervescence to the beverages disclosed here. Any
of the techniques and carbonating equipment known in the art for carbonating
beverages may be employed. Carbon dioxide may enhance the beverage taste and
appearance and may aid in safeguarding the beverage purity by inhibiting and
destroying objectionable bacteria. A volume of gas occupies the same space as does
the liquid by which it is dissolved. The carbon dioxide content may be selected by
those skilled in the art based on the desired level of effervescence and the impact of
the carbon dioxide on the taste or mouthfeel of the beverage. The carbonation may be
natural or synthetic.
[032] As used in this disclosure, unless otherwise specified, the term "added" or
"combined" and like terms means that the multiple ingredients or components
referred to (e.g., one or more sweeteners, etc.) are combined in any manner and in any
order, with or without stirring or the like, etc.
[033] Notwithstanding the claims, the invention is also defined by way of the following
clauses:
1. A method of producing a diet carbonated soft drink comprising
a. combining water and a sweetening amount of Reb D to produce Reb D
sweetened water;
b. injecting carbon dioxide into the Reb D sweetened water to produce
carbonated Reb D sweetened water;
c. combining the carbonated Reb D sweetened water with unsweetened syrup to
form the diet carbonated soft drink.
2. The method according to clause 1 wherein the carbonated Reb D sweetened water is
combined with the syrup by injecting a stream of carbonated Reb D sweetened water
into a container simultaneously with a stream of unsweetened syrup.
3. The method according to clause 1 or clause 2 wherein the Reb D sweetened water
contains 400 to 500 ppm Reb D.
4. The method according to any one of clauses 1-3 wherein the Reb D sweetened water
contains 425 to 475 ppm Reb D.
5. The method according to any one of clauses 1-4 wherein the unsweetened syrup
comprises one or more selected from colors, acids, caffeine, flavorants, and
preservatives.
6. The method according to any one of clauses 1-5 further comprising combining the
Reb D and water in a water holding tank.
7. The method according to any one of clauses 1-6 wherein 1 part syrup is combined
with 5 parts Reb D sweetened water.
8. A diet carbonated soft drink prepared in accordance with the method according to any
one of clauses 1-7.
9. The diet carbonated soft drink of clause 8 wherein the pH is 3 to 5.
0. A method of producing a diet carbonated soft drink comprising
a. combining water and a sweetening amount of Rebaudioside D (Reb D) to
produce Reb D sweetened water;
b. combining the carbonated Reb D sweetened water with syrup;
c. injecting carbon dioxide into the combined Reb D sweetened water and syrup
to produce the diet carbonated soft drink.
11. The method according to clause 10 further comprising injecting the diet carbonated
soft drink into containers.
12. The method according to clause 10 or clause 11 wherein the Reb D sweetened water
contains 400 to 500 ppm Reb D.
13. The method according to any one of clauses 10-12 wherein the Reb D sweetened
water contains 425 to 475 ppm Reb D.
14. The method according to any one of clauses 10-13 wherein the unsweetened syrup
comprises one or more selected from colors, acids, caffeine, flavorants, and
preservatives.
15. The method according to any one of clauses 10-14 further comprising combining the
Reb D and water in a water holding tank.
16. The method according to any one of clauses 10-15 wherein 1 part syrup is combined
with 5 parts Reb D sweetened water.
17. A diet carbonated soft drink prepared in accordance with the method according to any
one of clauses 10-16.
18. The diet carbonated soft drink of clause 7 wherein the pH is 3 to 5.
[034] Example 1
[035] Water is combined with Reb D powder to produce sweetened water having about 450
ppm Reb D. The Reb D sweetened water is combined with 4 volumes of carbon
dioxide to form carbonated Reb D sweetened water. An unsweetened syrup is
prepared containing at least cola flavor, phosphoric acid, and caffeine. The
carbonated Reb D sweetened water and unsweetened syrup are injected
simultaneously into bottles at a ratio of 5 parts water to 1 part syrup. The bottles are
capped.
While this disclosure mentions specific examples and embodiments, those skilled in
the art will appreciate that there are numerous variations and modifications within the
spirit and scope of the invention as set forth in the appended claims. Each word and
phrase used in the claims is intended to include all its dictionary meanings consistent
with its usage in this disclosure and/or with its technical and industry usage in any
relevant technology area. Indefinite articles, such as "a," and "an" and the definite
article ''the" and other such words and phrases are used in the claims in the usual and
traditional way in patents, to mean "at least one" or "one or more." The word
"comprising" is used in the claims to have its traditional, open-ended meaning, that is,
to mean that the product or process defined by the claim may optionally also have
additional features, elements, etc. beyond those expressly recited in the claim.
What is Claimed is:
1. A method of producing a diet carbonated soft drink comprising
a. combining water and a sweetening amount of Reb D to produce Reb D
sweetened water;
b. injecting carbon dioxide into the Reb D sweetened water to produce
carbonated Reb D sweetened water;
c. combining the carbonated Reb D sweetened water with unsweetened syrup to
form the diet carbonated soft drink.
2. The method of claim 1 wherein the carbonated Reb D sweetened water is combined
with the syrup by injecting a stream of carbonated Reb D sweetened water into a
container simultaneously with a stream of unsweetened syrup.
3. The method of claim 1 wherein the Reb D sweetened water contains 400 to 500 ppm
Reb D.
4. The method of claim 1 wherein the Reb D sweetened water contains 425 to 475 ppm
Reb D.
5. The method of claim 1 wherein the unsweetened syrup comprises one or more
selected from colors, acids, caffeine, flavorants, and preservatives.
6. The method of claim 1 further comprising combining the Reb D and water in a water
holding tank.
7. The method of claim 1 wherein 1 part syrup is combined with 5 parts Reb D
sweetened water.
8. A diet carbonated soft drink prepared in accordance with claim .
9. The diet carbonated soft drink of claim 8 wherein the pH is 3 to 5.
10. A method of producing a diet carbonated soft drink comprising
a. combining water and a sweetening amount of Rebaudioside D (Reb D) to
produce Reb D sweetened water;
b. combining the carbonated Reb D sweetened water with syrup;
c. injecting carbon dioxide into the combined Reb D sweetened water and syrup
to produce the diet carbonated soft drink.
11. The method of claim 10 further comprising injecting the diet carbonated soft drink
into containers.
12. The method of claim 10 wherein the Reb D sweetened water contains 400 to 500 ppm
Reb D.
The method of claim 10 wherein the Reb D sweetened water contains 425 to 475 ppm
Reb D.
The method of claim 10 wherein the unsweetened syrup comprises one or more
selected from colors, acids, caffeine, flavorants, and preservatives.
The method of claim 0 further comprising combining the Reb D and water in a water
holding tank.
The method of claim 10 wherein 1 part syrup is combined with 5 parts Reb D
sweetened water.
A diet carbonated soft drink prepared in accordance with claim 10.
The diet carbonated soft drink of claim 17 wherein the pH is 3 to 5.