Patent US2060324A successfully refreshed from Google Patents.
Patent US4287304A successfully refreshed from Google Patents.
US4287304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fermentable sugar from the hydrolysis of starch derived from dry milled corn
Assignee: Equistar Chemicals LP
•
Filing: 1980-01-14
•
Granted: 1981-09-01
•
Expires: 2000-01-14
Abstract
Abstract Starch derived from dry milled corn is hydrolyzed to provide a sterile aqueous fermentable sugar solution which is especially adapted for fermentative conversion to ethanol with minimum thermal expenditure. Following an initial mild hydrolysis to thin, or liquefy, the starch, substantially all of the water insoluble protein and oil components, and a portion of the water soluble components, e.g., sugars, lipids, proteins and vitamins, are separately recovered from the partial starch hydrolysate with the water solubles being recycled to the system. Thereafter, the partial starch hydrolysate is subjected to further hydrolysis to provide an aqueous solution of fermentable sugar.
Inventors
- 👤 Werner C. Muller
- 👤 Franklyn D. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:14
CPC Classifications
C; C12; C12P; C12P19/00; C12P19/14; C12F; C12F3/00; C12F3/10; C12P7/00; C12P7/02; C12P7/04; C12P7/06; Y; Y02; Y02E; Y02E50/00; Y02E50/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
150 words
A process for converting the starch fraction derived from whole dry milled corn to a sterile aqueous solution of fermentable sugar, said starch containing water insoluble protein and oil and one or more water soluble components selected from the group consisting of sugar, lipid, protein, vitamin and mineral, which comprises: (a) liquefying an aqueous slurry of the starch by hydrolysis to provide sterile aqueous partial starch hydrolysate slurry containing the water insoluble protein and oil and the water soluble components in substantially unaltered condition; (b) separating the slurry resulting from liquefying step (a) into an aqueous sterile slurry of partial starch hydrolysate containing a part of the water soluble components and an aqueous slurry of water insoluble protein and oil containing the remaining part of the water soluble components; and, (c) saccharifying the relatively thin aqueous slurry of partial starch hydrolysate to provide a sterile aqueous solution of fermentable sugar.
Claim 2
Dependent Claim
150 words
A process for converting the starch fraction derived from whole dry milled corn to a sterile aqueous solution of fermentable sugar, said starch containing water insoluble protein and oil and one or more water soluble components selected from the group consisting of sugar, lipid, protein, vitamin and mineral, which comprises: (a) liquefying an aqueous slurry of the starch by hydrolysis to provide sterile aqueous partial starch hydrolysate slurry containing the water insoluble protein and oil and the water soluble components in substantially unaltered condition; (b) separating the slurry resulting from liquefying step (a) into an aqueous sterile slurry of partial starch hydrolysate containing a part of the water soluble components and an aqueous slurry of water insoluble protein and oil containing the remaining part of the water soluble components; and, (c) saccharifying the relatively thin aqueous slurry of partial starch hydrolysate to provide a sterile aqueous solution of fermentable sugar.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the corn feed for liquefying step (a) is dehulled corn.
Claim 4
Dependent Claim
22 words
The process of claim 1 wherein the sterile aqueous solution of fermentable sugar is subjected to fermentation to provide dilute aqueous ethanol.
Claim 5
Dependent Claim
34 words
The process of claim 3 wherein the dilute aqueous ethanol is concentrated in a rectifying column with the aqueous bottoms from said rectifying column being recycled for use in a subsequent liquefying step (a).
Claim 6
Dependent Claim
16 words
The process of claim 4 wherein the concentrated ethanol is substantially dehydrated to provide anhydrous ethanol.
Claim 7
Dependent Claim
58 words
The process of claim 1 further comprising the steps of: (d) diluting the aqueous slurry of water insoluble protein and oil resulting from step (b) with water; (e) separating water from the water insoluble protein and oil resulting from step (d); and, (f) recycling the water recovered in step (e) for use in a subsequent liquefying step (a).
Claim 8
Dependent Claim
14 words
The process of claim 1 wherein liquefying step (a) is carried out with enzyme.
Claim 9
Dependent Claim
14 words
The process of claim 1 wherein saccharifying step (c) is carried out with enzyme.
Claim 10
Dependent Claim
14 words
The process of claim 1 wherein liquefying step (a) is carried out with acid.
Claim 11
Dependent Claim
14 words
The process of claim 1 wherein saccharifying step (c) is carried out with enzyme.
Claim 12
Dependent Claim
195 words
A process for converting the starch fraction derived from dry milled degerminated corn to a sterile aqueous solution of fermentable sugar, said starch containing water insoluble protein, a relatively minor amount of the oil of the whole corn, and one or more water soluble components selected from the group consisting of sugar, lipid, protein, vitamin and mineral, which comprises: (a) liquefying an aqueous slurry of the starch by hydrolysis to provide sterile aqueous partial starch hydrolysate slurry containing the water insoluble protein and the water soluble components in substantially unaltered condition; (b) separating the slurry resulting from liquefying step (a) into an aqueous sterile slurry of partial starch hydrolysate containing a part of the water soluble components and an aqueous slurry of water insoluble protein containing the remaining part of the water soluble components; (c) saccharifying the aqueous slurry of partial starch hydrolysate to provide a sterile aqueous solution of fermentable sugar; (d) diluting the aqueous slurry of water insoluble protein from step (b) with water; (e) separating water from the water insoluble protein resulting from step (d); and, (f) recycling the water recovered in step (e) for use in a subsequent liquefying step (a).
Claim 13
Dependent Claim
195 words
A process for converting the starch fraction derived from dry milled degerminated corn to a sterile aqueous solution of fermentable sugar, said starch containing water insoluble protein, a relatively minor amount of the oil of the whole corn, and one or more water soluble components selected from the group consisting of sugar, lipid, protein, vitamin and mineral, which comprises: (a) liquefying an aqueous slurry of the starch by hydrolysis to provide sterile aqueous partial starch hydrolysate slurry containing the water insoluble protein and the water soluble components in substantially unaltered condition; (b) separating the slurry resulting from liquefying step (a) into an aqueous sterile slurry of partial starch hydrolysate containing a part of the water soluble components and an aqueous slurry of water insoluble protein containing the remaining part of the water soluble components; (c) saccharifying the aqueous slurry of partial starch hydrolysate to provide a sterile aqueous solution of fermentable sugar; (d) diluting the aqueous slurry of water insoluble protein from step (b) with water; (e) separating water from the water insoluble protein resulting from step (d); and, (f) recycling the water recovered in step (e) for use in a subsequent liquefying step (a).
Claim 14
Dependent Claim
17 words
The process of claim 11 wherein the corn feed for liquefying step (a) is degerminated, dehulled corn.
Claim 15
Dependent Claim
21 words
The process of claim 11 wherein the relatively minor amount of oil in the water insoluble protein fraction is removed therefrom.
References Cited (Backward Citations)
US2698826A
Cited
US3236740A
Cited
US3251717A
Cited
US4069103A
Cited
US4217414A
Cited
US4089745A
Cited
US4181748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |