US4098693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic chlorine-resistant polymeric flocculants and their use
Assignee: Veolia WTS USA Inc
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Filing: 1976-01-02
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Granted: 1978-07-04
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Expires: 1996-01-02
Abstract
Abstract Cationic, chlorine-resistant polymeric materials, useful as flocculants, are prepared by reacting an epihalohydrin with a mixture consisting of a lower di-alkylamine and ammonia, where the molar ratio of the amine to ammonia is from about 5:1 to about 2:1, and the ratio of the epihalohydrin to the amine-ammonia mixture is from about 0.9 up to the functional equivalency of the amine mixture, for a time and at temperature conditions such that the resultant polymeric material has a viscosity of about 50 cps to about 4000 cps (Brookfield, spindle 1, 12 rpm) at about 50% real solids content.
Inventors
- 👤 Richard G. Tonkyn
- 👤 Norman Vorchheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:45
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
136 words
The process of flocculating undesirable particulate matter from an aqueous medium, which comprises, adding to said medium an effective amount of a quaternary, cationic, polymeric material consisting essentially of the reaction product of a caustic addition free reaction mixture of an epihalohydrin, ammonia and a lower dialkylamine, wherein said amine has from 1 to 3 carbons per alkyl group, wherein the amount of the ammonia ranges from about 15% to 33% of the total molar amount of the ammonia-amine concentration, wherein the ratio of the epihalohydrin to said ammonia-amine concentration is from about 0.9 up to the functional limit of said concentration, and wherein said polymeric material has a viscosity of from about 50 cps to about 4000 cps (Brookfield, spindle 1, 12 rpm) at a real solids content of from about 45% to about 55%.
Claim 2
Dependent Claim
136 words
The process of flocculating undesirable particulate matter from an aqueous medium, which comprises, adding to said medium an effective amount of a quaternary, cationic, polymeric material consisting essentially of the reaction product of a caustic addition free reaction mixture of an epihalohydrin, ammonia and a lower dialkylamine, wherein said amine has from 1 to 3 carbons per alkyl group, wherein the amount of the ammonia ranges from about 15% to 33% of the total molar amount of the ammonia-amine concentration, wherein the ratio of the epihalohydrin to said ammonia-amine concentration is from about 0.9 up to the functional limit of said concentration, and wherein said polymeric material has a viscosity of from about 50 cps to about 4000 cps (Brookfield, spindle 1, 12 rpm) at a real solids content of from about 45% to about 55%.
Claim 3
Dependent Claim
23 words
The process of claim 1, further comprising adding to said aqueous medium an amount of a coagulant aid along with said polymeric material.
Claim 4
Dependent Claim
24 words
The process of claim 1, wherein said ammonia amount is from about 17% to about 25% of said total molar amount of ammonia-amine concentration.
Claim 5
Dependent Claim
16 words
The process of claim 3, wherein said lower di-alkylamine is di-methylamine and said epihalohydrin is epichlorohydrin.
Claim 6
Dependent Claim
26 words
The process of claim 4, wherein said viscosity is from about 100 cps to about 4000 cps and wherein said real solids content is about 50%.
Claim 7
Dependent Claim
23 words
The process of claim 5 further comprising adding to said aqueous medium an amount of a coagulant aid along with said polymeric material.
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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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |