US4704209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulphonate-containing terpolymers as flocculants for suspended solids
Assignee: Ecolab USA Inc
•
Filing: 1986-07-28
•
Granted: 1987-11-03
•
Expires: 2006-07-28
Abstract
Abstract A process of flocculating suspended solids which comprises treating such suspension with an effective amount of a flocculant comprising a water-soluble terpolymer which contains sulfonate groups and has an RSV of at least 15.
Inventors
- 👤 Paul F. Richardson
- 👤 Lawrence J. Connelly
- 👤 Dodd W. Fong
- 👤 Ralph W. Kaesler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:56
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08F; C08F8/00; C08F8/34; C08F2800/00; C08F2800/10; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/906; Y10S210/907
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A process of flocculating suspended solids in an aqueous suspension selected from the group consisting of a coal refuse slurry, phosphate slimes, and refuse from a sand and gravel plant which comprises treating said suspension with an effective amount of a flocculant comprising a water-soluble terpolymer having a reduced specific viscosity of at least 24 and being composed of the random repeating units: ##STR2## where: R is methyl or hydrogen, M is hydrogen, alkali meta, ammonia, or amine, R' is --(CH 2 ) n and, n is 1 or 2, with the mol ratio of A:B:C being: A(3-50):B(55-95):C(4-15), flocculating the suspended solids and then separating the flocculated solids from the suspension.
Claim 2
Dependent Claim
111 words
A process of flocculating suspended solids in an aqueous suspension selected from the group consisting of a coal refuse slurry, phosphate slimes, and refuse from a sand and gravel plant which comprises treating said suspension with an effective amount of a flocculant comprising a water-soluble terpolymer having a reduced specific viscosity of at least 24 and being composed of the random repeating units: ##STR2## where: R is methyl or hydrogen, M is hydrogen, alkali meta, ammonia, or amine, R' is --(CH 2 ) n and, n is 1 or 2, with the mol ratio of A:B:C being: A(3-50):B(55-95):C(4-15), flocculating the suspended solids and then separating the flocculated solids from the suspension.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the ratio of A:B:C is: A(4-35):B(55-95):C(4-15).
Claim 4
Dependent Claim
7 words
The process of claim 1 wherein n=1.
Claim 5
Dependent Claim
7 words
The process of claim 1 wherein n=2.
Claim 6
Dependent Claim
13 words
The process of claim 1 wherein the suspension is a coal refuse slurry.
Claim 7
Dependent Claim
7 words
The process of claim 5 wherein n=2.
Claim 8
Dependent Claim
11 words
The process of claim 1 wherein the suspension is phosphate slimes.
Claim 9
Dependent Claim
7 words
The process of claim 7 wherein n=2.
Claim 10
Dependent Claim
16 words
The process of claim 1 wherein the suspension is refuse from a sand and gravel plant.
Claim 11
Dependent Claim
7 words
The process of claim 9 wherein n=2.
References Cited (Backward Citations)
US3692673A
Cited
US4147681A
Cited
US4342653A
Cited
US4555346A
Cited
US4599390A
Cited
US4569768A
Cited
US4545902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-02 | 1991-05-04 | 1991-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-02 | 1995-05-04 | 1995-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-02 | 1999-05-04 | 1999-11-03 | $7700.00 | Window Closed / Lapsed |