US3929632A
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Use of polymeric quaternary ammonium betaines as oil-in-water demulsifiers
Assignee: Baker Petrolite LLC
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Filing: 1974-03-19
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Granted: 1975-12-30
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Expires: 1994-03-19
Abstract
Abstract Polymeric quaternary ammonium betaines; the preparation thereof; and uses therefor. These are illustrated by polymers and copolymers of dicarboxylic anhydrides such as maleic anhydride and copolymers thereof derived from copolymerizable compounds such as olefins, vinyl compound, etc.; a carboxylic acid group of the anhydride polymeric unit being esterified with a quaternary alkanolamine. The polymers are prepared by reacting the anhydride-containing polymer with an alkylene oxide and a tertiary amine to form quaternary alkanolamine esters.
Inventors
- 👤 Rudolf S Buriks
- 👤 Allen R Fauke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:22
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/105; A; A61; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8164; A61Q; A61Q5/00; A61Q5/06; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; B01D71/00; B01D71/06; B01D71/40; B01D71/403; C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08F; C08F8/00; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/835
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
THE PROCESS OF DEMULSIFYING AN OIL-IN-WATER EMULSION WHICH COMPRISES TREATING SAID EMULSION WITH AN EFFECTIVE AMOUNT OF A POLYMERIC QUARTERNARY AMMONIUM BETAIN WHICH HAS NO ANIONS, THE SAID POLYMERIC BETAINE CONTAINING REPEATING UNITS HAVING A - COO- GROUP INTERNALLY LINKED TO A QUARTERNARY AMMONIUM GROUP AND BEING DERIVED FROM A DICARBOXYLIC ACID ANHYDRIDE.
Claim 2
Dependent Claim
53 words
THE PROCESS OF DEMULSIFYING AN OIL-IN-WATER EMULSION WHICH COMPRISES TREATING SAID EMULSION WITH AN EFFECTIVE AMOUNT OF A POLYMERIC QUARTERNARY AMMONIUM BETAIN WHICH HAS NO ANIONS, THE SAID POLYMERIC BETAINE CONTAINING REPEATING UNITS HAVING A - COO- GROUP INTERNALLY LINKED TO A QUARTERNARY AMMONIUM GROUP AND BEING DERIVED FROM A DICARBOXYLIC ACID ANHYDRIDE.
Claim 3
Dependent Claim
46 words
The process of claim 1 where the polymeric quaternary ammonium betaine is a maleic-type polymer having maleic monomer units in each of which one carboxy group appears as the aforementioned - COO group and the other is bonded to a group bearing the quaternary ammonium group.
Claim 4
Dependent Claim
34 words
The process of claim 2 where the polymeric quaternary ammonium betaine of the maleic polymer is a quaternary ammonium derivative of an alkanolamine monoester of the maleic unit of the betaine containing repeating unit.
Claim 5
Dependent Claim
21 words
The process of claim 3 where the polymeric quaternary ammonium betaine has the following repeating polymer unit structure in the polymer
Claim 6
Dependent Claim
18 words
The process of claim 4 where the polymeric quaternary ammonium betaine has a repeating unit of the formula
Claim 7
Dependent Claim
65 words
The process of claim 5 where the quaternary ammonium betaine is selected from the group consisting of isobutylene-maleic anhydride-dimethyl dodecylamine-ethylene oxide, 1-octene-maleic anhydride-dimethyl dodecylamine-ethylene oxide, diisobutylene-maleic anhydride-trimethyl amine-ethylene oxide, diisobutylene-maleic anhydride-trimethyl amine-propylene oxide, styrene-maleic anhydride-trimethyl amine-ethylene oxide, the styrene-maleic anhydride being a 1:1 copolymer, styrene-maleic anhydride-trimethyl amine-ethylene oxide, the styrene-maleic anhydride being a 2:1 copolymer, ethylene-maleic anhydride-trimethyl amine-ethylene oxide, and ethylene-maleic anhydride-dimethyl octyl amine-ethylene oxide.
Claim 8
Dependent Claim
24 words
The process of claim 5 where the polymeric quaternary ammonium betaine is styrene-maleic anhydride-trimethyl amine-ethylene oxide wherein the styrene-maleic anhydride is a 1:1 copolymer.
Claim 9
Dependent Claim
24 words
The process of claim 5 where the polymeric quaternary ammonium betaine iS styrene-maleic anhydride-trimethyl amine-ethylene oxide wherein the styrene-maleic anhydride is a 2:1 copolymer.
Claim 10
Dependent Claim
16 words
The process of claim 5 where the polymeric quaternary ammonium betaine is diisobutylene-maleic anhydride-trimethyl amine-ethylene oxide.
Claim 11
Dependent Claim
16 words
The process of claim 5 where the polymeric quaternary ammonium betaine is diisobutylene-maleic anhydride-trimethyl amine-propylene oxide.
Claim 12
Dependent Claim
16 words
The process of claim 5 where the polymeric quaternary ammonium betaine is ethylene-maleic anhydride-trimethyl amine-ethylene oxide.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |