# US 5,710,270 A · Water-soluble polysaccharide and a process for producing the same

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- Number: US 5,710,270 A
- Document ID: US5710270A
- Status: Granted
- Kind: A
- Application number: 08/647,558
- Filed: 1996-05-14
- Granted: 1998-01-20
- Earliest claimed: 1994-07-12
- Assignees: Fuji Oil Company, Limited
- Inventors: Hirokazu Maeda; Hitoshi Furuta; Ryuji Yoshida; Taro Takahashi; Yoko Sato; Masanori Hisakawa; Susumu Teranishi
- Web page: https://patentgrep.com/patent/US5710270A

## CPC

- C08B 37/006: {Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof}
- A23C 9/137: Thickening substances
- A23L 29/206: of vegetable origin
- C08B: POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C07H; fermentation or enzyme-using processes C12P19/00; sugar industry C13; production of cellulose D21)
- A23C: DAIRY PRODUCTS, e.g. MILK, BUTTER OR CHEESE; MILK OR CHEESE SUBSTITUTES; PREPARATION THEREOF (preservation thereof A23B11/00)
- A23L: FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES, NOT OTHERWISE PROVIDED FOR; PREPARATION OR TREATMENT THEREOF (preservation thereof A23B)

## Abstract

There is disclosed a water-soluble polysaccharide composed of rhamnose, fucose, arabinose, xylose, galactose, glucose and uronic acid, and a degree of esterification of uronic acid of not more than 50%. This water-soluble polysaccharide is useful as a protein stabilizer. A process for preparing the same and food containing the same is also disclosed.

## Claims

### Claim 1

A process for preparing a water-soluble polysaccharide wherein its constituent sugar components are rhamnose, fucose, arabinose, xylose, galactose, glucose and uronic acid, and having a degree of esterification of uronic acid not more than 50%, comprising demethoxylation of a methylated carboxyl group of uronic acid before or after extraction of a water-soluble hemicellulose, and in which process, said demethoxylation step comprises heating a raw material containing a water-soluble hemicellulose at a temperature of from 40.degree. to 90.degree. C. at a pH of from 9 to 14, and said extraction step comprises heat extracting a raw material containing a water-soluble hemicellulose at a temperature of from 80.degree. to 130.degree. C. at a pH of from 3 to 6 and separating a water-soluble fraction.

### Claim 2 (depends on 1)

A process according to claim 1, wherein the raw material from which the water-soluble hemicellulose is extracted is vegetable.

### Claim 3 (depends on 2)

A process according to claim 2, wherein the vegetable is a cereal.

### Claim 4 (depends on 2)

A process according to claim 2, wherein the vegetable is a soybean.

### Claim 5 (depends on 1)

A process according to claim 1, wherein a pH of from 9 to 14 is effected by adding an alkali including sodium hydroxide, potassium hydroxide, calcium hydroxide or ammonia water.