US3691086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-water separations
Assignee: Calgon Corp
•
Filing: 1970-07-31
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Granted: 1972-09-12
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Expires: 1990-07-31
Abstract
Abstract Disclosed is a process of facilitating the separation of oil from oil-in-water liquid emulsion systems. The system is contacted with a separation aid including either (1) certain polymers, (2) polymers in conjunction with certain salts, or (3) polymers in conjunction with salts and silica sol. The polymers are water soluble cationic vinyl polymers. The salts are water soluble salts of polyvalent metals which salts in water solution give an acid reaction.
Inventors
- 👤 Ronald D Lees
- 👤 Ronald W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:45
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/54; C10; C10G; C10G33/00; C10G33/04
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
28 words
Process of claim 1 wherein the polymer is a vinyl homopolymer selected from the group consisting of homopolymers of acrylate and methacrylate alkyl esters containing quaternary ammonium groups.
Claim 2
Dependent Claim
66 words
Process of claim 1 wherein the polymer is a vinyl polymer containing both quaternary ammonium groups and tertiary amine groups, said vinyl polymers selected from the group consisting of the copolymer of Beta -methacryloyloxyethyldimethylamine and Beta -methacryloyloxyethyltrimethylammonium methyl sulfate; poly( Beta -dimethylaminoethylmethacrylate) reacted with dimethyl sulfate, and poly(methyldiallylamine) reacted with epichlorohydrin; the amount of quaternary ammonium groups being greater than the amount of tertiary amine groups.
Claim 3
Dependent Claim
43 words
Process of claim 1 wherein the polymer is a copolymer of a vinyl monomer containing quaternary ammonium groups and up to 99 percent by weight of the total of acrylamide or acrylamide substituted on the alpha carbon atom or on the nitrogen atom.
Claim 4
Dependent Claim
68 words
Process of claim 1 wherein the polymer is a terpolymer of a vinyl monomer containing quaternary ammonium groups, a vinyl monomer containing tertiary amine groups, and up to 99 percent by weight of the total of acrylamide or acrylamide substituted on the alpha carbon atom or on the nitrogen atom, the amount of quaternary ammonium groups in the terpolymer being greater than the amount of tertiary amine groups.
Claim 5
Dependent Claim
13 words
Process of claim 2 wherein the polymer is poly( Beta -methacryloyloxyethyltrimethylammonium methyl sulfate).
Claim 6
Dependent Claim
17 words
Process of claim 4 wherein the polymer is a copolymer of acrylamide and Beta -methacryloyloxyethyltrimethylammonium methyl sulfate.
Claim 7
Dependent Claim
16 words
Process of claim 4 wherein the polymer is a copolymer of acrylamide and 1,2-dimethyl-5-vinylpyridinium methyl sulfate.
Claim 8
Dependent Claim
29 words
Process of claim 1 wherein the polymer is employed in conjunction with a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
Claim 9
Dependent Claim
32 words
Process of claim 1 wherein the polymer is employed in conjunction with silica sol and a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
Claim 10
Dependent Claim
29 words
Process of claim 6 wherein the polymer is employed in conjunction with a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
Claim 11
Dependent Claim
32 words
Process of claim 6 wherein the polymer is employed in conjunction with silica sol and a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
Claim 12
Dependent Claim
29 words
Process of claim 2 wherein the polymer is employed in conjunction with a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
Claim 13
Dependent Claim
32 words
Process of claim 2 wherein the polymer is employed in conjunction with silica sol and a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
Claim 14
Dependent Claim
29 words
Process of claim 7 wherein the polymer is employed in conjunction with a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
Claim 15
Dependent Claim
32 words
Process of claim 7 wherein the polymer is employed in conjunction with silica sol and a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
Claim 16
Dependent Claim
29 words
Process of claim 8 wherein the polymer is employed in conjunction with a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
Claim 17
Dependent Claim
32 words
Process of claim 8 wherein the polymer is employed in conjunction with silica sol and a water soluble salt of a polyvalent metal which salt in water solution gives an acid reaction.
References Cited (Backward Citations)
US2915476A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |