Patent US3969239A successfully refreshed from Google Patents.
US3969239A
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Method for using macroamine polymers as flocculating agents
Assignee: B R Chemical Co Ltd
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Filing: 1975-07-09
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Granted: 1976-07-13
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Expires: 1995-07-09
Abstract
Abstract A method for using a macroamine polymer as a flocculating agent, said polymer having a structural unit shown by the following formula: ##EQU1## wherein R represents an alkyl group containing 1 to 4 carbon atoms, x is a mol decimal fraction between about 0.65 and 0.95, and y is a mol decimal fraction between about 0.23 and 0.04. Said polymer can be obtained by reacting polyvinyl bromide with an N-monoalkylaniline having 1 to 4 carbon atoms in the alkyl group.
Inventors
- 👤 Isao Shinohara
- 👤 Juro Aoyagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:55
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; B; B01; B01D; B01D21/00; B01D21/01; C08; C08F; C08F8/00; C08F8/30; C08F8/32; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
95 words
In a process for treating water to remove dissolved and suspended impurities including metallic ions, bentonite or dyestuffs by floculation, the improvement comprising a. dissolving in said water an effective amount of a water soluble linear macroamine polymer consisting essentially of a structural unit shown by the following formula: ##EQU5## wherein R represents alkyl group containing 1 to 4 carbon atoms, x is a mol decimal fraction between about 0.65 and 0.95, and y is a mol decimal fraction between about 0.23 and 0.04, and b. separating floc formed in step (a) from said water.
Claim 2
Dependent Claim
95 words
In a process for treating water to remove dissolved and suspended impurities including metallic ions, bentonite or dyestuffs by floculation, the improvement comprising a. dissolving in said water an effective amount of a water soluble linear macroamine polymer consisting essentially of a structural unit shown by the following formula: ##EQU5## wherein R represents alkyl group containing 1 to 4 carbon atoms, x is a mol decimal fraction between about 0.65 and 0.95, and y is a mol decimal fraction between about 0.23 and 0.04, and b. separating floc formed in step (a) from said water.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein x in the macroamine polymer is between 0.80 and 0.95.
Claim 4
Dependent Claim
16 words
The process of claim 1 in which R in the macroamine polymer is the methyl group.
Claim 5
Dependent Claim
16 words
The process of claim 1 in which R in the macroamine polymer is the isopropyl group.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |