Patent EP0089276A1 successfully refreshed from Google Patents.
US4401574A
Expired / Lapsed
US
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Flocculation of aqueous paint waste
Assignee: Drew Chemical Corp
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Filing: 1981-07-21
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Granted: 1983-08-30
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Expires: 2001-07-21
Abstract
Abstract Paint waste water containing dispersed paint solids is clarified by flocculating the solids with a basic poly aluminum chloride having the following structural formula: Al.sub.n (OH).sub.m Cl.sub.3n-m wherein n and m are integers and 3n is larger than m, and the basicity is from 30% to 83%.
Inventors
- 👤 Thomas A. Farrington
- 👤 Tamara Nowakowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:26
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/5245; C01; C01F; C01F7/00; C01F7/48; C01F7/56; C01F7/57; C09; C09D; C09D7/00; C09D7/71; C02F2103/00; C02F2103/14; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/91; Y10S210/93
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
64 words
In a process for clarifying latex paint waste water containing dispersed latex paint solids, the improvement comprising: flocculating the latex paint solids with an effective flocculating amount of a poly aluminum chloride characterized by the following structural formula: Al.sub.n (OH).sub.m Cl.sub.3n-m wherein n and m are integers and 3n is greater than m and the basicity as a percentage is from 30% to 83%.
Claim 2
Dependent Claim
64 words
In a process for clarifying latex paint waste water containing dispersed latex paint solids, the improvement comprising: flocculating the latex paint solids with an effective flocculating amount of a poly aluminum chloride characterized by the following structural formula: Al.sub.n (OH).sub.m Cl.sub.3n-m wherein n and m are integers and 3n is greater than m and the basicity as a percentage is from 30% to 83%.
Claim 3
Dependent Claim
20 words
The process of claim 1 wherein the poly aluminum chloride is employed in an amount of at least 10 ppm.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the paint waste includes non-ionic surfactant.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein a polyelectrolyte is also employed to improve flocculation.
Claim 6
Dependent Claim
18 words
The process of claim 4 wherein the polyelectrolyte is employed in an amount of at least 1 ppm.
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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |