Patent US4062882A successfully refreshed from Google Patents.
US4062882A
Expired / Lapsed
US
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Process for refining crude glyceride oils by membrane filtration
Assignee: Lever Brothers Co
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Filing: 1975-05-09
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Granted: 1977-12-13
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Expires: 1995-05-09
Abstract
Abstract Crude glyceride oils are refined by membrane filtration under pressure in solutions in organic solvents, particularly to separate phosphatides, which may also be refined according to the invention. The solvents are non-acidic, non-hydroxy solvents, e.g., esters, hydrocarbons and halogenated hydrocarbons, particularly in which micelles are formed and the solution is contacted under pressure with a semi-permeable membrane, preferably anisotropic and made from synthetic resin. These pass a permeate fraction of low molecular weight components, eg the glycerides and solvent, and retain a fraction of higher molecular weight, e.g., phosphatide micelles.
Inventors
- 👤 Achintya Kumar Sen Gupta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:49
CPC Classifications
C; C11; C11B; C11B7/00; B; B01; B01D; B01D61/00; B01D61/14; B01D61/145; B01D61/16; C11B3/00; C11B3/008
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
141 words
A process for refining crude glyceride oil compositions comprising the steps of a. diluting the composition with a non-acidic non-alcoholic organic solvent to provide a more mobile and essentially non-aqueous solution containing glycerides and components of greater effective molecular weight in the solution, b. contacting one side of a semi-permeable, non-porous, anistropic membrane having a retention cut-off limit between 1,500 and 200,000 with the resulting solution under positive pressure from 5 to 50 kgs/cm 2 until constituents of the composition, of different molecular weight are separated into retentate and liquid permeate fractions in contact with the respective sides of the membrane containing the glyceride oil in substantially the same concentration in the two fractions, in solution in the said solvent, c. recovering at least one liquid composition comprising one of said fractions and removing solvent therefrom to provide a refined product.
Claim 2
Dependent Claim
141 words
A process for refining crude glyceride oil compositions comprising the steps of a. diluting the composition with a non-acidic non-alcoholic organic solvent to provide a more mobile and essentially non-aqueous solution containing glycerides and components of greater effective molecular weight in the solution, b. contacting one side of a semi-permeable, non-porous, anistropic membrane having a retention cut-off limit between 1,500 and 200,000 with the resulting solution under positive pressure from 5 to 50 kgs/cm 2 until constituents of the composition, of different molecular weight are separated into retentate and liquid permeate fractions in contact with the respective sides of the membrane containing the glyceride oil in substantially the same concentration in the two fractions, in solution in the said solvent, c. recovering at least one liquid composition comprising one of said fractions and removing solvent therefrom to provide a refined product.
Claim 3
Dependent Claim
28 words
Process according to claim 1 wherein the said composition comprises a mixture of glyceride and phosphatide constituents and the solvent is one in which phospholipid micelles are formed.
Claim 4
Dependent Claim
17 words
Process according to claim 2 wherein the said composition comprises crude vegetable or animal oil containing phosphatides.
Claim 5
Dependent Claim
16 words
Process according to claim 2 wherein the said composition comprises crude phosphatide from a glyceride oil.
Claim 6
Dependent Claim
14 words
Process according to claim 1 wherein the said composition comprises soyabean or rapeseed oil.
Claim 7
Dependent Claim
24 words
Process according to claim 1 wherein the molecular weight of said solvent is not substantially more than that of glycerides present in glyceride oils.
Claim 8
Dependent Claim
17 words
Process according to claim 6 wherein the molecular weight of the solvent is from 50 to 200.
Claim 9
Dependent Claim
16 words
Process according to claim 6 wherein the solvent comprises an inert hydrocarbon or halogenated inert hydrocarbon.
Claim 10
Dependent Claim
10 words
Process according to claim 8 wherein the solvent comprises hexane.
Claim 11
Dependent Claim
11 words
Process according to claim 7 wherein the solvent comprises an ester.
Claim 12
Dependent Claim
21 words
Process according to claim 10 wherein the solvent comprises an ester of a lower fatty acid with a lower monohydric alcohol.
Claim 13
Dependent Claim
13 words
Process according to claim 7 wherein the solvent comprises an aliphatic carbonyl compound.
Claim 14
Dependent Claim
10 words
Process according to claim 12 wherein the solvent comprises acetone.
Claim 15
Dependent Claim
28 words
Process according to claim 7 wherein the composition is diluted with sufficient solvent to provide a solution of from 10 to 50 wt % of the composition therein.
Claim 16
Dependent Claim
16 words
Process according to claim 7 wherein the separation is continued with intervening dilution with said solvent.
Claim 17
Dependent Claim
21 words
Process according to claim 15 wherein solvent is added to maintain constituents in the retentate at substantially constant concentration during separation.
Claim 18
Dependent Claim
19 words
Process according to claim 7 wherein the solvent is removed from at least one of said fractions by evaporation.
Claim 19
Dependent Claim
18 words
Process according to claim 7 wherein the solution is maintained in turbulent flow in contact with the membrane.
Claim 20
Dependent Claim
11 words
Process according to claim 1 wherein the membrane comprises an elastomer.
Claim 21
Dependent Claim
16 words
Process according to claim 18 wherein the membrane is anisotropic and comprises an oil-resistant synthetic resin.
Claim 22
Dependent Claim
25 words
Process according to claim 20 wherein the retention cut-off limit of the membrane is from 1.5 × 10 3 to 2 × 10 5 .
Claim 23
Dependent Claim
11 words
Process according to claim 21 wherein the membrane material comprises polyacrylonitrile.
Claim 24
Dependent Claim
13 words
Process according to claim 20 wherein the membrane comprises a polysulphone or polyamide.
Claim 25
Dependent Claim
17 words
Process according to claim 1 wherein the pressure applied is from 2 to 50 Kg/cm 2 .
Claim 26
Dependent Claim
27 words
Process according to claim 24 wherein the membrane comprises an anisotropic, oil-resistant synthetic resin membrane and the pressure applied is from 2 to 10 Kg/cm 2 .
Claim 27
Dependent Claim
18 words
Process according to claim 1 wherein the membrane is contacted at a temperature from 10° to 60° C.
Claim 28
Dependent Claim
21 words
Process according to claim 1 wherein the said solution comprises miscella obtained by extracting vegetable oil including phosphatides using said solvent.
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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) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |