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Patent US3939281A successfully refreshed from Google Patents.
US3939281A
Expired / Lapsed
US
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Extraction of fat from starch-containing vegetable matter
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1973-11-09
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Granted: 1976-02-17
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Expires: 1993-11-09
Abstract
Abstract Fat is removed from starch-containing vegetable material such as cereal grains, potatoes or tapioca by a process involving crushing the vegetable material, contacting the crushed material with a normally gaseous inert solvent under supercritical condition at a temperature of about 20° to 100°C and a pressure of about 30 to 1000 atmospheres to dissolve fat from the vegetable material into the solvent, separating the fat-containing solvent from the resultant substantially fat-free vegetable residue, and separating the dissolved fat from the solvent by raising the temperature and/or lowering the pressure to separate vaporized solvent from the fat. The vaporized solvent may be liquefied and recycled. The fat-free residue may be treated to dissolve away gluten, to form glucose by enzymatic hydrolysis and/or subjected to alcoholic fermentation.
Inventors
- 👤 Dieter Schwengers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:36
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203; C; C11; C11B; C11B1/00; C11B1/10; C11B1/104; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/54
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
The process for degreasing vegetable matter containing starch and fats which comprises crushing said vegetable matter, extracting the crushed matter with a normally gaseous inert solvent in liquid state at a temperature of about 20° to 100°C and below the critical temperature and a pressure of about 30 to 1000 atmospheres and above the critical pressure of the inert solvent which solvent has a critical temperature below about 200°C, separating the fat-containing solvent from the substantially fatfree vegetable residue, separating the dissolved fat from the solvent by raising the temperature to vaporize the solvent, and reducing the pressure of the fat-free vegetable residue.
Claim 2
Dependent Claim
103 words
The process for degreasing vegetable matter containing starch and fats which comprises crushing said vegetable matter, extracting the crushed matter with a normally gaseous inert solvent in liquid state at a temperature of about 20° to 100°C and below the critical temperature and a pressure of about 30 to 1000 atmospheres and above the critical pressure of the inert solvent which solvent has a critical temperature below about 200°C, separating the fat-containing solvent from the substantially fatfree vegetable residue, separating the dissolved fat from the solvent by raising the temperature to vaporize the solvent, and reducing the pressure of the fat-free vegetable residue.
Claim 3
Dependent Claim
16 words
The process of claim 1, wherein the pressure during extraction is about 40 to 150 atmospheres.
Claim 4
Dependent Claim
13 words
The process of claim 1, wherein the vegetable matter comprises freshly harvested cereal.
Claim 5
Dependent Claim
37 words
The process of claim 1, wherein the solvent comprises at least one member selected from the group consisting of alkenes, dialkyl ethers, halogenated alkanes, argon, NH 3 , N 2 , SO 2 and CO 2 .
Claim 6
Dependent Claim
25 words
The process of claim 4, where the solvent comprises at least two of said members of which one is SO 2 or CO 2 .
Claim 7
Dependent Claim
38 words
The process of claim 1, including the further steps of grinding the fat-free vegetable residue, mixing the ground residue with at least about twice its weight of water, and separating an aqueous suspension of starch from unsuspended residue.
Claim 8
Dependent Claim
57 words
The process of claim 1, including the further steps of soaking the fat-free vegetable residue with about 1.5 to 3 times its weight of water having about 0.1 to 0.2% by weight of SO 2 dissolved therein to dissolve away gluten from the residue, and separating husks and fiber from said residue to leave the raw starch.
Claim 9
Dependent Claim
44 words
The process of claim 1, including the further steps of suspending the fat-free vegetable residue in at least about twice its weight of water, adding starch-decomposing enzymes to said suspension thereby to decompose the starch to glucose, and removing the aqueous solution of glucose.
Claim 10
Dependent Claim
19 words
The process of claim 1, including the further step of subjecting the fat-free vegetable residue to an alcoholic fermentation.
References Cited (Backward Citations)
US2107529A
Cited
US2286334A
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US3155523A
Cited
US3337414A
Cited
US3519431A
Cited
US3795750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |