US3658557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing coloring agents for food and beverages
Assignee: KH Neochem Co Ltd
•
Filing: 1969-09-23
•
Granted: 1972-04-25
•
Expires: 1989-09-23
Abstract
Abstract A coloring agent for foods and beverages having anti-oxidizing, oxygen-absorbing and lipoxidase-inhibiting properties is prepared by heating an alkaline aqueous mixture of a saccharide and an amino acid to generate the coloring agent, and then dealkalizing the reaction solution by neutralization with an acid or by treatment on an acidic cation exchange resin. The pH of the aqueous mixture must be at least 11, preferably 11 - 13, in order to obtain the desired properties.
Inventors
- 👤 Hirotoshi Samejima
- 👤 Yuji Nagano
- 👤 Shigenori Ota
- 👤 Yasushi Kanzaki
- 👤 Hideki Matsuo
- 👤 Keizo Kuroda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:36
CPC Classifications
C; C09; C09B; C09B61/00; A; A23; A23G; A23G3/00; A23G3/32; A23L; A23L5/00; A23L5/40; A23L5/42; A23L5/47; A23L5/48
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
14 words
The process of claim 1, wherein said amino acid is a basic amino acid.
Claim 2
Dependent Claim
26 words
The process of claim 1, wherein said amino acid is selected from the group consisting of glycine, alanine, glutamic acid, aspartic acid, lysine, ornithine and arginine.
Claim 3
Dependent Claim
17 words
The process of claim 1, wherein the pH of said aqueous mixture is about 11 to 13.
Claim 4
Dependent Claim
32 words
The process of claim 1, wherein a caustic alkali selected from the group consisting of sodium hydroxide, potassium hydroxide and sodium carbonate is used to adjust the pH of said aqueous mixture.
Claim 5
Dependent Claim
22 words
The process of claim 1, further comprising the step of concentrating the obtained product under a vacuum to give a concentrate thereof.
Claim 6
Dependent Claim
25 words
The process of claim 1, further comprising the step of drying the obtained product by vacuum-drying, freeze-drying or spray-drying to give a solid coloring agent.
Claim 7
Dependent Claim
14 words
A coloring agent for foods and beverages produced by the process of claim 1.
Claim 8
Dependent Claim
115 words
A process for the preparation of a coloring agent for foods and beverages, said coloring agent having anti-oxidizing, oxygen-absorbing and lipoxidase-inhibiting properties, which comprises heating an aqueous mixture of glucose or fructose and an amino acid in an amount sufficient to produce the desired color selected from the group consisting of glycine, lysine, alanine, glutamic acid and sodium and potassium salts thereof at a temperature of about 100* to 120* C., a said aqueous mixture having a pH of about 11 to 13, to generate said coloring agent, and then dealkalizing the resultant reaction solution by neutralization with an acid or by treatment with a weakly acidic cation exchange resin in the free acid form.
Claim 9
Dependent Claim
32 words
The process of claim 9, wherein a caustic alkali selected from the group consisting of sodium hydroxide, potassium hydroxide and sodium carbonate is used to adjust the pH of said aqueous mixture.
Claim 10
Dependent Claim
129 words
A process for coloring foods and beverages which comprises forming a food or a beverage coloring agent having anti-oxidizing, oxygen-absorbing and lipoxidase-inhibiting properties by heating at a temperature of about 100* to 120* C. and thereby reacting an aqueous mixture of a saccharide selected from the group consisting of glucose, fructose, galactose, ribose, xylose and lactose and an amino acid, the ratio by mole of the amino acid to the saccharide at the time of reaction being 1:1-5, said aqueous mixture having a pH of 11 or above, to generate said coloring agent, then dealkalizing the resultant reaction solution by neutralization with an acid or by treatment with a weakly acidic cation exchange resin in the free acid form and adding the dealkalized solution to the foods or beverages.
Claim 11
Dependent Claim
26 words
The process of claim 11, wherein said amino acid is selected from the group consisting of glycine, alanine, glutamic acid, aspartic acid, lysine, ornithine and arginine.
Claim 12
Dependent Claim
123 words
A process for coloring foods and beverages which comprises forming a food or a beverage coloring agent having anti-oxidizing, oxygen-absorbing and lipoxidase-inhibiting properties by heating an aqueous mixture of glucose or fructose and an amino acid in an amount sufficient to produce the desired color selected from the group consisting of glycine, lysine, alanine, glutamic acid and sodium and potassium salts thereof at a temperature of about 100* to 120* C., said aqueous mixture having a pH of about 11 to 13, to generate said coloring agent, then dealkalizing the resultant reaction solution by neutralization with an acid or by treatment with a weakly acidic cation exchange resin in the free acid form and adding the dealkalized solution to the foods or beverages.
Claim 13
Dependent Claim
95 words
A process for the preparation of a coloring agent for foods and beverages, said coloring agent having anti-oxidizing, oxygen-absorbing and lipoxidase-inhibiting properties, which comprises heating at a relatively low temperature and thereby reacting an aqueoUs mixture of a reducing saccharide and an amino acid in an amount sufficient to produce the desired color, said aqueous mixture having a pH of 11 or above, to generate said coloring agent, and then dealkalizing the resultant reaction solution by neutralizing with an acid or by treatment with a weakly acid cation exchange resin in the free acid form.
References Cited (Backward Citations)
US2021621A
Cited
US2784118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |