Patent US4049686A successfully refreshed from Google Patents.
US4049686A
Expired / Lapsed
US
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Degumming process for triglyceride oils
Assignee: Lever Brothers Co
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Filing: 1976-03-10
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Granted: 1977-09-20
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Expires: 1996-03-10
Abstract
Abstract Triglyceride oils are degummed according to a two-stage process, in which in the first step a substantially concentrated solution of an acid or an anhydride, having a pH of at least 0.5 as measured at 20 DEG C in a one molar aqueous solution, is dispersed in the oil, and in a second step 0.2 to 5 wt.% of water is dispersed in the mixture obtained and an aqueous sludge is separated from the oil after the water has been in contact with the oil-acid-mixture for at least 5 minutes at a temperature below 40 DEG C.
Inventors
- 👤 Hendrik Johan Ringers
- 👤 Jacobus Cornelis Segers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:46
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/02; C11B3/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
130 words
A process for removing phosphatides from triglyceride oils which are substantially liquid at 40° C. comprising the steps of dispersing an acid or acid anhydride in the oil, said acid or acid anhydride having a pH of from 0.5 to 7 as measured at 20° C. in a one molar aqueous solution and said oil at a temperature of from 20° to 100° C., adjusting the temperature of the mixture to the range of from the lowest temperature at which the oil remains a liquid to 40° C., dispersing from 0.2 to 5 percent by weight of water in the mixture; maintaining the temperature of the mixture of oil, acid and water from 5 minutes to several days; and, thereafter separating an aqueous sludge containing the phosphatides from the oil.
Claim 2
Dependent Claim
130 words
A process for removing phosphatides from triglyceride oils which are substantially liquid at 40° C. comprising the steps of dispersing an acid or acid anhydride in the oil, said acid or acid anhydride having a pH of from 0.5 to 7 as measured at 20° C. in a one molar aqueous solution and said oil at a temperature of from 20° to 100° C., adjusting the temperature of the mixture to the range of from the lowest temperature at which the oil remains a liquid to 40° C., dispersing from 0.2 to 5 percent by weight of water in the mixture; maintaining the temperature of the mixture of oil, acid and water from 5 minutes to several days; and, thereafter separating an aqueous sludge containing the phosphatides from the oil.
Claim 3
Dependent Claim
25 words
Process according to claim 1 in which the temperature of the oil is from 65° to 90° C. when the acid or anhydride is added.
Claim 4
Dependent Claim
25 words
Process according to claim 1 in which an aqueous solution of an edible acid containing 10 to 50% of the acid of water is used.
Claim 5
Dependent Claim
14 words
Process according to claim 3, in which an aqueous citric acid solution is used.
Claim 6
Dependent Claim
25 words
Process according to claim 4, in which from 0.001 to 0.5% by weight of citric acid, calculated as dry acid, is added to the oil.
Claim 7
Dependent Claim
22 words
Process according to claim 5, in which 0.001 to 0.01% by weight of citric acid is added to a crude extracted oil.
Claim 8
Dependent Claim
29 words
Process according to claim 5, in which 0.1 to 0.3% by weight of citric acid is added to an oil, from which the hydratable phosphatides have been substantially removed.
Claim 9
Dependent Claim
26 words
Process according to claim 1, in which before separating the aqueous sludge, the oil, water and acid mixture is adjusted to 20° C. - 35° C.
Claim 10
Dependent Claim
19 words
Process according to claim 1, in which 0.5 to 3% by weight of water is added to the oil.
Claim 11
Dependent Claim
19 words
Process according to claim 9, in which 1 to 2% by weight of water is added to the oil.
Claim 12
Dependent Claim
28 words
Process according to claim 8, in which before the separation of the aqueous sludge, the mixture of oil, water and acid is maintained for at least 0.5 hours.
Claim 13
Dependent Claim
17 words
Process according to claim 1, in which the aqueous sludge is separated from the oil by centrifuging.
Claim 14
Dependent Claim
52 words
Process according to claim 12, in which the mixture of oil, acid and water after the contact time is heated to a temperature of 60° C. to 90° C. in a sufficiently short time to avoid conversion of the gums to their high temperature phase and thereafter the mixture is immediately centrifuged.
Claim 15
Dependent Claim
21 words
Process according to claim 13, in which the heating is carried our in about from 1 second to about 1 minute.
Claim 16
Dependent Claim
13 words
Process according to claim 1, in which the process is carried out continuously.
Claim 17
Dependent Claim
54 words
Process according to claim 1, in which an oil chosen from the group consisting of soybean oil, rapeseed oil, sesame seed oil, sunflower seed oil, rice bran oil, grapeseed oil, coconut oil, cottonseed oil, groundnut oil, linseed oil, maize oil, palm oil, palm kernel oil, safflower oil, sal fat and shea fat is used.
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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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |