Patent US4125550A successfully refreshed from Google Patents.
US4125550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of free fatty acids from water immiscible fluids via ion exchange resins
Assignee: Rohm and Haas Co
•
Filing: 1976-09-30
•
Granted: 1978-11-14
•
Expires: 1996-09-30
Abstract
Abstract Certain anion exchange resins are used for the removal of free fatty acids from water immiscible fluids. This anion exchange system can function without the necessity of organic solvents and with the resin in a hydrous state.
Inventors
- 👤 Karl A. Schoenenberger
- 👤 William Fries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:43
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/10; B; B01; B01J; B01J41/00; B01J41/04; B01J41/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
Method for removing free organic acids from a non-aqueous, water immiscible liquid which comprises: (1) bringing said fluid into contact with particles of a water-solvated, macroreticular, strong-base, quaternary anion-exchange resin in its hydroxyl form; (2) adsorbing said acids onto said resin; (3) separating said fluid from said resin; and (4) regenerating said resin to its original form using aqueous regenerants.
Claim 2
Dependent Claim
60 words
Method for removing free organic acids from a non-aqueous, water immiscible liquid which comprises: (1) bringing said fluid into contact with particles of a water-solvated, macroreticular, strong-base, quaternary anion-exchange resin in its hydroxyl form; (2) adsorbing said acids onto said resin; (3) separating said fluid from said resin; and (4) regenerating said resin to its original form using aqueous regenerants.
Claim 3
Dependent Claim
22 words
Method according to claim 1 wherein the water-immiscible liquid is a glyceride oil and the free organic acids are free fatty acids.
Claim 4
Dependent Claim
23 words
Method according to claim 1 wherein said resin is a macroreticular, crosslinked acrylic polymer aminolyzed with dimethylaminopropylamine and then quaternized with methyl chloride.
Claim 5
Dependent Claim
22 words
Method according to claim 1 wherein said resin is a macroreticular, crosslinked styrene polymer which is chloromethylated and then aminated with dimethylethanolamine.
Claim 6
Dependent Claim
22 words
Method according to claim 3 wherein the free organic acids are free fatty acids, and the water-immiscible liquid is a glyceride oil.
Claim 7
Dependent Claim
22 words
Method according to claim 4 wherein the free organic acids are free fatty acids, and the water-immiscible liquid is a glyceride oil.
Claim 8
Dependent Claim
57 words
Method according to claim 5 wherein the glyceride oil is selected from the group comprising cottonseed oil, soybean oil, peanut oil, corn oil, anchovy oil and coconut oil, said oil is treated at usual ambient temperatures in an essentially organic-solvent-free state, and the means for separating the oil from the resin involves displacing the oil with water.
Claim 9
Dependent Claim
23 words
Method according to claim 2 wherein the content of free fatty acids is about 0.03% or less in the glyceride oil after treatment.
Claim 10
Dependent Claim
23 words
Method according to claim 5 wherein the content of free fatty acids is about 0.03% or less in the glyceride oil after treatment.
Claim 11
Dependent Claim
47 words
Method according to claim 1 wherein the regeneration step involves eluting the adsorbed acids with an aqueous solution of a mineral acid, and thereafter contacting the resin with a water rinse followed by an aqueous solution of caustic alkali to restore the resin to the hydroxyl form.
References Cited (Backward Citations)
US2456428A
Cited
US2667417A
Cited
US2771480A
Cited
US3221008A
Cited
US3377369A
Cited
US3950365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-13 | 1982-05-15 | 1982-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-13 | 1986-05-15 | 1986-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-13 | 1990-05-15 | 1990-11-14 | $7700.00 | Window Closed / Lapsed |