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US4466923A
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Supercritical CO2 extraction of lipids from lipid-containing materials
Assignee: United States, AS REPRESENTED BY SECRETAY OF AGRICULTURE
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Filing: 1982-04-01
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Granted: 1984-08-21
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Expires: 2002-04-01
Abstract
Abstract In the extraction of lipid-containing substances with supercritical CO2, triglyceride solubilities of up to 20% or more are obtainable by the simultaneous application of temperatures in excess of about 60 DEG C. and pressures of at least 550 bar.
Inventors
- 👤 John P. Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:21
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/10; C11B1/104; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0203; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/54
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A method for the extraction of a lipid from a lipid-containing material by means of a carbon dioxide solvent under supercritical conditions, said method comprising: a. contacting said lipid-containing material with carbon dioxide at a pressure within the range of at least 550 bar and a temperature within the range of about 60° to 100° C. in order to dissolve the lipid in the carbon dioxide, whereby the combination of pressure and temperature is sufficient for the solubility of said lipid in said carbon dioxide to be at least about 5% by weight; and b. separating said carbon dioxide with the dissolved lipid from said material.
Claim 2
Independent Claim
106 words
A method for the extraction of a lipid from a lipid-containing material by means of a carbon dioxide solvent under supercritical conditions, said method comprising: a. contacting said lipid-containing material with carbon dioxide at a pressure within the range of at least 550 bar and a temperature within the range of about 60° to 100° C. in order to dissolve the lipid in the carbon dioxide, whereby the combination of pressure and temperature is sufficient for the solubility of said lipid in said carbon dioxide to be at least about 5% by weight; and b. separating said carbon dioxide with the dissolved lipid from said material.
Claim 3
Dependent Claim
26 words
A method as described in claim 1 wherein said lipid is a vegetable oil and said lipid-containing material is a vegetable seed or vegetable seed component.
Claim 4
Dependent Claim
14 words
A method as described in claim 2 wherein said lipid-containing material is an oilseed.
Claim 5
Dependent Claim
16 words
A method as described in claim 2 wherein said lipid-containing material is a cereal seed germ.
Claim 6
Dependent Claim
22 words
A method as described in claim 1 wherein said lipid is an animal fat and said lipid-containing material is of animal origin.
Claim 7
Dependent Claim
17 words
A method as described in claim 1 wherein said pressure is in the range of 700-1200 bar.
Claim 8
Dependent Claim
17 words
A method as described in claim 1 wherein said temperature is in the range of 60°-80° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |