US4026794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for resolving oil-in-water emulsions by the use of a cationic polymer and the water soluble salt of an amphoteric metal
Assignee: ChampionX LLC
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Filing: 1976-08-30
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Granted: 1977-05-31
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Expires: 1996-08-30
Abstract
Abstract 2.0 to 20,000 ppm of a composition comprising 15-50% by weight of a water soluble salt of an amphoteric metal and from 1.0 to 15% by weight of a water soluble cationic vinyl addition terpolymer said terpolymer containing prior to polymerization 5-40% by weight of a diallyl dimethyl ammonium halide, 5-75% by weight N-vinyl-2-pyrrolidone and 10-60% by weight of acrylamide or methacrylamide has been found to be an effective oil-in-water emulsion breaker. The above composition when added to the oily waste water will neutralize the negatively charged water particles and form an easily recoverable floc containing the oil.
Inventors
- 👤 Frank A. Mauceri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:58
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
A process for the removal of emulsified oils from waste water, said oily waste water containing from 1.0-100,000 ppm by weight of said oil, the removal being performed by the following steps: A. maintaining the pH of the waste water below 10.0; B. adding to the waste water with agitation from 2.0-20,000 ppm of an aqueous composition comprising: 1. 15-50% by weight of a water soluble salt of an amphoteric metal; 2. 1.0-15% by weight of a water soluble cationic terpolymer containing prior to polymerization: a. 5-40% by weight of diallyl dimethyl ammonium chloride; b. 5-70% by weight N-vinyl-2-pyrrolidone; c. 10-60% acrylamide, said terpolymer having a molecular weight of from 5,000 to 300,000; 3. 35-84% water, whereby, a floc containing said oil is formed; and then, C. recovering said floc.
Claim 2
Dependent Claim
130 words
A process for the removal of emulsified oils from waste water, said oily waste water containing from 1.0-100,000 ppm by weight of said oil, the removal being performed by the following steps: A. maintaining the pH of the waste water below 10.0; B. adding to the waste water with agitation from 2.0-20,000 ppm of an aqueous composition comprising: 1. 15-50% by weight of a water soluble salt of an amphoteric metal; 2. 1.0-15% by weight of a water soluble cationic terpolymer containing prior to polymerization: a. 5-40% by weight of diallyl dimethyl ammonium chloride; b. 5-70% by weight N-vinyl-2-pyrrolidone; c. 10-60% acrylamide, said terpolymer having a molecular weight of from 5,000 to 300,000; 3. 35-84% water, whereby, a floc containing said oil is formed; and then, C. recovering said floc.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the pH of the oily waste water is maintained between 5.0-9.5.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein the water soluble salt of an amphoteric metal is from the group consisting of magnesium chloride, zinc chloride, aluminum chloride, aluminum sulfate, ferric sulfate, and ferric chloride.
Claim 5
Dependent Claim
39 words
The process of claim 1 wherein the aqueous composition contains: A. 20-40% by weight of the water soluble salt of the amphoteric metal; B. 1.0-10.0% by weight of the water soluble cationic terpolymer; and, C. 50.0-79.0% by weight water.
Claim 6
Dependent Claim
28 words
The process of claim 4 wherein the water soluble cationic terpolymer contains as monomer units: A. 15-35% diallyl dimethyl ammonium chloride; B. 30-50% n-vinyl-2-pyrrolidone; and, C. 20-50% acrylamide.
Claim 7
Dependent Claim
19 words
The process of claim 1 wherein the water soluble salt of an amphoteric metal is Mg Cl 2 .
Claim 8
Dependent Claim
19 words
The process of claim 1 wherein the water soluble salt of an amphoteric metal is Zn Cl 2 .
Claim 9
Dependent Claim
15 words
The process of claim 1 wherein the polymer has a molecular weight of from 100,000-200,000.
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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |