US4266027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the hydrolysis of starch and fermentable hydrolysates obtained therefrom
Assignee: Equistar Chemicals LP
•
Filing: 1980-03-12
•
Granted: 1981-05-05
•
Expires: 2000-03-12
Abstract
Abstract An aqueous starch slurry is initially hydrolyzed in the presence of acid or enzyme and thereafter, the liquefied starch is saccharified in the presence of an acid cationic exchange resin to provide a sterile aqueous solution containing at least about 60 weight percent fermentable sugar based on the weight of the original starch present.
Inventors
- 👤 Werner C. Muller
- 👤 Franklyn D. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:01
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
67 words
A process for the hydrolysis of starch to provide an aqueous solution of fermentable sugar which comprises: (a) liquefying an aqueous slurry of starch in the presence of a liquefying agent selected from the group consisting of strong acid and liquefying enzyme to provide sterile liquefied starch; and, (b) saccharifying the liquefied starch in the presence of a catalytically effective amount of an acidic cationic exchange resin.
Claim 2
Dependent Claim
67 words
A process for the hydrolysis of starch to provide an aqueous solution of fermentable sugar which comprises: (a) liquefying an aqueous slurry of starch in the presence of a liquefying agent selected from the group consisting of strong acid and liquefying enzyme to provide sterile liquefied starch; and, (b) saccharifying the liquefied starch in the presence of a catalytically effective amount of an acidic cationic exchange resin.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein the starch is derived from cassava, taro, soughum, wheat, potatoes, rice, or milo.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein the starch contains water soluble protein, fat, sugar, vitamins, and/or minerals.
Claim 5
Dependent Claim
23 words
The process of claim 1 wherein the starch contains water insoluble components which are removed prior to the consumption of the saccharified starch.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein strong acid is used to achieve liquefaction.
Claim 7
Dependent Claim
28 words
The process of claim 5 wherein the strong acid is at least one member of the group consisting of nitric acid, sulfuric acid, hydrochloric acid and phosphoric acid.
Claim 8
Dependent Claim
44 words
The process of claim 6 wherein ammonia or aqueous ammonia is added to the liquefiled starch to at least partially neutralize the acid and form at least one salt selected from the group consisting of ammonium nitrate, ammonium sulfate, ammonium chloride and ammonium phosphate.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein liquefying enzyme is used to achieve liquefaction.
Claim 10
Dependent Claim
38 words
The process of claim 8 wherein the pH of the aqueous starch slurry is adjusted to from about 3.0 to about 6.0 prior to, with, or following the addition of liquefying enzyme but before significant liquefaction has occurred.
Claim 11
Dependent Claim
38 words
The process of claim 8 wherein the pH of the aqueous starch slurry is adjusted to from about 4.0 to about 5.0 prior to, with, or following the addition of liquefying enzyme but before signficant liquefaction has occurred.
Claim 12
Dependent Claim
16 words
The process of claim 9 wherein the pH is adjusted by use of a strong acid.
Claim 13
Dependent Claim
25 words
The process of claim 11 wherein the strong acid is selected from the group consisting of nitric acid, sulfuric acid, hydrochloric acid and phosphoric acid.
Claim 14
Dependent Claim
11 words
The process of claim 8 wherein the liquefying enzyme is alpha-amylase.
Claim 15
Dependent Claim
23 words
The process of claim 1 wherein the acid cationic exchange resin possesses a three dimensional hydrocarbon network to which are attached acid groups.
Claim 16
Dependent Claim
19 words
The process of claim 1 wherein the acid cationic exchange resin contains sulfonic, phosphonic, phosphonous or arsenic acid groups.
Claim 17
Dependent Claim
20 words
The process of claim 1 wherein the acid cationic exchange resin is sulfonated cross-linked polystyrene or sulfonated phenol-aldehyde condensation product.
Claim 18
Dependent Claim
29 words
The process of claim 1 wherein stillage bottoms containing unfermentable sugar repolymerizates and/or isomers are subjected to saccarifying step (b) to convert said repolymerizates and/or isomers to fermentable sugar.
References Cited (Backward Citations)
US2606847A
Cited
US2770562A
Cited
US3592734A
Cited
US3383245A
Cited
US3616219A
Cited
US3690948A
Cited
US3912590A
Cited
US3922199A
Cited
US3922196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |