US4760138A
Expired / Lapsed
US
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Carbonating agents and their preparation
Assignee: Nestec SA
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Filing: 1986-01-29
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Granted: 1988-07-26
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Expires: 2006-01-29
Abstract
Abstract Dry, stable carbonating agents comprised of a carbohydrate/metal bicarbonate complex are disclosed. The complex is prepared by reacting a carbohydrate with a metal hydroxide or oxide at a temperature not exceeding 25° C. to form a carbohydrate/metal hydroxide adduct to which carbon dioxide is then introduced to form the complex. The complex is then immediately dried, preferably by freeze drying. The carbonating agents are particularly useful as components of dehydrated beverage powders. Upon rehydration, the complex releases carbon dioxide and carbonates the beverage. Additionally, upon rehydration the complex promotes the solubilization of the carbohydrate components in the beverage.
Inventors
- 👤 Rebecca S. So
- 👤 Albert A. Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:41
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/24; A23F5/36; A23F5/40; A23L; A23L2/00; A23L2/40
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
64 words
A method comprising: (a) admixing a metal hydroxide, oxide or mixture thereof with an aqueous carbohydrate solution at a temperature of less than 25° C. (b) adding carbon dioxide to the solution for forming a reaction medium while maintaining the resulting reaction medium at a temperature of less than 25° C.; and then (c) drying the reaction medium for obtaining a dry, stable complex.
Claim 2
Independent Claim
64 words
A method comprising: (a) admixing a metal hydroxide, oxide or mixture thereof with an aqueous carbohydrate solution at a temperature of less than 25° C. (b) adding carbon dioxide to the solution for forming a reaction medium while maintaining the resulting reaction medium at a temperature of less than 25° C.; and then (c) drying the reaction medium for obtaining a dry, stable complex.
Claim 3
Independent Claim
140 words
A method comprising: (a) admixing a sufficient amount of a metal hydroxide, oxide or mixture thereof with an aqueous carbohydrate solution, while maintaining the solution at a temperature of less than 25° C., to obtain a pH of from 9 to 12; and then (b) adding sufficient carbon dioxide to the solution for forming a reaction medium to lower the pH to within the range of from 7 to 10 while maintaining the resulting reaction medium at a temperature of less than 25° C.; (c) repeating steps (a) and (b) until between 0.25 to 3.0 moles of the hydroxide, oxide or mixture thereof has been added for each mole of carbohydrate present and until a pH of from 7 to 10 is obtained; (d) filtering the reaction medium; and then (e) drying the filtrate for obtaining a dry, stable complex.
Claim 4
Independent Claim
140 words
A method comprising: (a) admixing a sufficient amount of a metal hydroxide, oxide or mixture thereof with an aqueous carbohydrate solution, while maintaining the solution at a temperature of less than 25° C., to obtain a pH of from 9 to 12; and then (b) adding sufficient carbon dioxide to the solution for forming a reaction medium to lower the pH to within the range of from 7 to 10 while maintaining the resulting reaction medium at a temperature of less than 25° C.; (c) repeating steps (a) and (b) until between 0.25 to 3.0 moles of the hydroxide, oxide or mixture thereof has been added for each mole of carbohydrate present and until a pH of from 7 to 10 is obtained; (d) filtering the reaction medium; and then (e) drying the filtrate for obtaining a dry, stable complex.
Claim 5
Dependent Claim
75 words
The method of claim 1, wherein: (a) the metal hydroxide, oxide or mixture thereof is admixed with the aqueous carbohydrate solution in an amount such that the mole ratio of carbohydrate to the cation of the metal hydroxide, oxide or mixture thereof is from about 1:0.25 to 1:3.0; and then (b) carbon dioxide is added to the solution until the pH of the resulting reaction medium is in the range of from 7 to 11.
Claim 6
Dependent Claim
23 words
The method of claim 3, wherein the carbon dioxide is added until the pH of the reaction medium is from 9 to 10.
Claim 7
Dependent Claim
14 words
The method of claim 1 or 2 or 3, wherein the carbohydrate is sucrose.
Claim 8
Dependent Claim
24 words
The method of claim 1 or 2 or 3, wherein calcium hydroxide, calcium oxide or a mixture thereof is added to the carbohydrate solution.
Claim 9
Dependent Claim
25 words
The method of claim 1 or 2 or 3, wherein an alkaline-earth metal hydroxide, oxide or a mixture thereof is added to the carbohydrate solution.
Claim 10
Dependent Claim
36 words
A dry, stable composition having the formula comprising: (carbohydrate).sub.a ·(M(HCO.sub.3).sub.b)·(H.sub.2 O).sub.c in which M is a metallic cation, a is 1 or 2, b is 1, 2 or 3 and c is 3, 4 or 5.
Claim 11
Dependent Claim
36 words
A dry, stable composition having the formula comprising: (carbohydrate).sub.a ·(M(HCO.sub.3).sub.b)·(H.sub.2 O).sub.c in which M is a metallic cation, a is 1 or 2, b is 1, 2 or 3 and c is 3, 4 or 5.
Claim 12
Dependent Claim
37 words
The composition of claim 8, wherein the metallic cation is selected from the group consisting of alkaline-earth metals and the carbohydrate is selected from the group consisting of mono-, di-, and poly-saccharides and polyols and combinations thereof.
Claim 13
Dependent Claim
11 words
A dry, stable composition having the formula comprising: (sucrose).sub.2 ·(Ca(HCO.sub.3).sub.2)·(H.sub.2 O).sub.3-5.
Claim 14
Dependent Claim
11 words
A dry, stable composition having the formula comprising: (sucrose).sub.2 ·(Ca(HCO.sub.3).sub.2)·(H.sub.2 O).sub.3-5.
Claim 15
Dependent Claim
32 words
The method of claim 1 or 2 or 3 wherein the temperatures of the solution of step (a) and the reaction medium of step (b) are from -5° C. to 10° C.
Claim 16
Dependent Claim
12 words
The method of claim 2 wherein the final pH is from 9-10.
Claim 17
Dependent Claim
18 words
The method of claim 1 or 2 or 3 wherein the product obtained by drying comprises a bicarbonate.
Claim 18
Dependent Claim
12 words
The product of claim 13 wherein the product is a carbohydrate/metal bicarbonate.
Claim 19
Dependent Claim
8 words
The product of claim 13 further comprising carbonates.
Claim 20
Dependent Claim
36 words
The method of claim 1 or 2 or 3 or 4 or 12, wherein the drying is performed by a method selected from the group consisting of freeze drying, spray drying, drum drying and vacuum drying.
Claim 21
Dependent Claim
9 words
The product prepared by the method of claim 16.
Claim 22
Dependent Claim
13 words
The product prepared by the method of claim 1 or 2 or 3.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |