US4414157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of crude glyceride oil compositions
Assignee: Nitto Denko Corp
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Filing: 1981-12-30
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Granted: 1983-11-08
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Expires: 2001-12-30
Abstract
Abstract A process for the purification of crude glyceride oil compositions which comprises bringing a miscella of a crude glyceride oil composition containing therein a glyceride oil and phospholipid into contact with a capillary semipermeable membrane to concentrate the miscella to a predetermined level, and thereafter bringing the preliminarily concentrated miscella into contact with a tubular semipermeable membrane to concentrate the miscella to a higher level.
Inventors
- 👤 Akio Iwama
- 👤 Yoshitaka Kazuse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:59
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/008; B; B01; B01D; B01D61/00; B01D61/14; B01D61/145; B01D61/146
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
159 words
A process for the purification of a crude glyceride oil composition which comprises diluting the crude glyceride oil composition containing a glyceride oil and phospholipid with an organic solvent, bringing the diluted crude glyceride oil composition under pressure into contact with an internal pressure capillary semipermeable membrane having an inner diameter of 0.1 to 2 mm to separate it into a semipermeable membrane permeable liquid and a semipermeable membrane impermeable liquid, bringing the thus-concentrated semipermeable membrane impermeable liquid under pressure into contact with an internal pressure type tubular semipermeable membrane having an inner diameter which is greater than that of the above capillary semipermeable membrane and which is 20 mm or less to separate it into a semipermeable membrane permeable liquid and a semipermeable membrane impermeable liquid, and removing the organic solvent from at least one of the total semipermeable membrane permeable liquid and the semipermeable membrane impermeable liquid to obtain a purified glyceride oil and/or a purified phospholipid.
Claim 2
Dependent Claim
159 words
A process for the purification of a crude glyceride oil composition which comprises diluting the crude glyceride oil composition containing a glyceride oil and phospholipid with an organic solvent, bringing the diluted crude glyceride oil composition under pressure into contact with an internal pressure capillary semipermeable membrane having an inner diameter of 0.1 to 2 mm to separate it into a semipermeable membrane permeable liquid and a semipermeable membrane impermeable liquid, bringing the thus-concentrated semipermeable membrane impermeable liquid under pressure into contact with an internal pressure type tubular semipermeable membrane having an inner diameter which is greater than that of the above capillary semipermeable membrane and which is 20 mm or less to separate it into a semipermeable membrane permeable liquid and a semipermeable membrane impermeable liquid, and removing the organic solvent from at least one of the total semipermeable membrane permeable liquid and the semipermeable membrane impermeable liquid to obtain a purified glyceride oil and/or a purified phospholipid.
Claim 3
Dependent Claim
66 words
The process as claimed in claim 1, wherein after the dilution of the crude glyceride oil composition containing the glyceride oil and phospholipid with the organic solvent, it is firstly concentrated to 2 to 10 times the original concentration by the use of the capillary type semipermeable membrane and then to 3 to 60 times the original concentration by the use of the tubular semipermeable membrane.
Claim 4
Dependent Claim
39 words
The process as claimed in claim 1 or 2, wherein the crude glyceride oil composition is diluted with the organic solvent to adjust the glyceride oil content to 10 to 80% by weight of the crude glyceride oil composition.
Claim 5
Dependent Claim
35 words
The process as claimed in claim 1, wherein the semipermeable membrane is made of a polyimide consisting essentially of a repeating unit represented by the general formula: ##STR6## wherein R is a divalent organic group.
Claim 6
Dependent Claim
15 words
The process as claimed in claim 4, wherein R in the general formula is ##STR7##
Claim 7
Dependent Claim
29 words
The process as claimed in claim 1, wherein the semipermeable membrane is made of an aromatic polyamide consisting essentially of a repeating unit represented by the general formula: ##STR8##
Claim 8
Dependent Claim
24 words
The process as claimed in any of claims 1 to 6, wherein the semipermeable membrane has a molecular weight cut-off of 10,000 to 100,000.
Claim 9
Dependent Claim
33 words
The process as claimed in claim 1, wherein the inner diameter of the internal pressure type tubular semipermeable membrane is about 5 to 160 times larger than that of the capillary semipermeable membrane.
Claim 10
Dependent Claim
41 words
The process as claimed in claim 1 wherein the inner diameter of the internal pressure capillary semipermeable membrane is from 0.15 to 1.8 mm and the inner diameter of the internal pressure tubular semipermeable membrane is from 2 to 20 mm.
Claim 11
Dependent Claim
69 words
The process as claimed in claim 9 wherein the linear rate of feeding the crude glyceride oil composition to the internal pressure capillary semipermeable membrane is 0.1-5 m/sec and the pressure is 0.2 to 5 kg/cm 2 and wherein the rate of feed of the concentrated semipermeable membrane impermeable liquid to the internal pressure type tubular semipermeable membrane is 0.5-10 m/sec and the pressure is 1-10 kg/cm 2 .
Claim 12
Dependent Claim
18 words
The process as claimed in claim 10 wherein the solvent has a molecular weight of 50 to 200.
Claim 13
Dependent Claim
13 words
The process as claimed in claim 11 wherein the temperature is 5°-100° C.
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) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |