US4255346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of an edible oil from crude soy oil
Assignee: Akzo NV
•
Filing: 1978-05-10
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Granted: 1981-03-10
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Expires: 1998-05-10
Abstract
Abstract Production of edible soybean oil from raw soybean oil extracted from soybeans by first moistening soybean flakes to raise their water content to 12 to 25% by weight and subjecting the moistened flakes to heat treatment at 90 DEG to 120 DEG C. and thereafter extracting crude soybean oil from the treated flakes with a non-polar solvent; subjecting the crude soybean oil, after removal of lecithin therefrom, to bleaching without a separate desliming step; and thereafter deodorizing with simultaneous deacidizing the bleached soybean oil.
Inventors
- 👤 Manfred Kock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:22
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/10; C11B1/00; C11B1/02; C11B1/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A method for producing an edible soybean oil which comprises moistening soybean pieces in the form of crushed and rolled flakes to raise their water content to 12 to 25% by weight and subjecting the moistened flakes to a heat treatment at temperatures in the range of 90° to 120° C. accompanied by a compacting mechanical movement of said flakes sufficient to reach a minimum bulk weight thereof of at least about 400 kg/m 3 , subsequently extracting crude soybean oil from said flakes with a non-polar solvent, removing licithin from the crude soybean oil, bleaching the resultant delecithinized oil, and, directly after the bleaching and without a separate desliming step, simultaneously deodorizing and deacidizing the delecithinized crude soybean oil to obtain edible soybean oil free from bitter taste.
Claim 2
Independent Claim
129 words
A method for producing an edible soybean oil which comprises moistening soybean pieces in the form of crushed and rolled flakes to raise their water content to 12 to 25% by weight and subjecting the moistened flakes to a heat treatment at temperatures in the range of 90° to 120° C. accompanied by a compacting mechanical movement of said flakes sufficient to reach a minimum bulk weight thereof of at least about 400 kg/m 3 , subsequently extracting crude soybean oil from said flakes with a non-polar solvent, removing licithin from the crude soybean oil, bleaching the resultant delecithinized oil, and, directly after the bleaching and without a separate desliming step, simultaneously deodorizing and deacidizing the delecithinized crude soybean oil to obtain edible soybean oil free from bitter taste.
Claim 3
Dependent Claim
24 words
A method as claimed in claim 1 wherein the water content of the moistened soybean flakes is raised to 14 to 20% by weight.
Claim 4
Dependent Claim
21 words
A method as claimed in claim 1, wherein the heat treatment temperature is in the range of 95° to 110° C.
Claim 5
Dependent Claim
26 words
A method as claimed in claim 1 wherein said non-polar solvent used in the extraction is one or more hydrocarbons having 5 to 12 carbon atoms.
Claim 6
Dependent Claim
18 words
A method as claimed in claim 1 wherein said soybean flakes are moistened by direct application of steam.
Claim 7
Dependent Claim
24 words
A method as claimed in claim 1 wherein the bleaching of the crude soybean oil is carried out with one or more adsorptive materials.
Claim 8
Dependent Claim
27 words
A method as claimed in claim 6 wherein said absorptive materials are selected from the group consisting of natural earths, acid-activated earths, activated carbon and silica gel.
Claim 9
Dependent Claim
41 words
A method as claimed in claim 1 wherein said mechanical movement together with said moistening and said heat treatment is sufficient to raise the bulk weight of said flakes to a minimum value of at least about 500 kg/m 3 .
Claim 10
Dependent Claim
35 words
A method as claimed in claim 1, 2 or 8 wherein said flakes upon completion of the heat treatment and mechanical movement are dried to a moisture content of about 8 to 14% by weight.
Claim 11
Dependent Claim
28 words
A method as claimed in claim 1, 2 or 8 wherein said heat treatment is carried out for a period of time of about 10 to 45 minutes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |