US4059515A
Expired / Lapsed
US
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Process for clarification of oil-containing waste
Assignee: Veolia WTS USA Inc
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Filing: 1977-03-18
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Granted: 1977-11-22
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Expires: 1997-03-18
Abstract
Abstract The present disclosure is directed to a process of separating oil from oil-containing wastewater which comprises treating the wastewater with a water-soluble cationic polymer obtained by the polymerization of an epihalohydrin with an alkylene polyamine having the formula ##STR1## wherein R is a lower alkylene having from 2 to about 6 carbon atoms, and R 1 and R 2 are each a lower alkyl of from 1 to about 6 carbon atoms.
Inventors
- 👤 William J. Fowler
- 👤 Richard A. Heberle
- 👤 Richard G. Tonkyn
- 👤 Norman Vorchheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:27
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
70 words
A process for separating oil from oil-containing wastewater which comprises treating the wastewater with a water-soluble cationic polymer consisting essentially of the product of the polymerization of an epihalohydrin with an alkylene polyamine having the formula ##STR4## wherein R is a lower alkylene having from 2 to about 6 carbon atoms, and R 1 and R 2 are each a lower alkyl of from 1 to about 6 carbon atoms.
Claim 2
Dependent Claim
70 words
A process for separating oil from oil-containing wastewater which comprises treating the wastewater with a water-soluble cationic polymer consisting essentially of the product of the polymerization of an epihalohydrin with an alkylene polyamine having the formula ##STR4## wherein R is a lower alkylene having from 2 to about 6 carbon atoms, and R 1 and R 2 are each a lower alkyl of from 1 to about 6 carbon atoms.
Claim 3
Dependent Claim
25 words
A process according to claim 1, wherein the mole ratio of epihalohydrin to polyamine is from about 0.60 : 1 to about 2.7 : 1.
Claim 4
Dependent Claim
69 words
A process according to claim 2, wherein said polymerization comprises reacting with the alkylene polyamine from about 50 to 90 percent of the amount of epihalohydrin to be polymerized, allowing the reaction to continue until the reaction medium attains a substantially uniform viscosity, and reacting the remaining portion of the epihalohydrin incrementally to obtain the cationic polymer, the temperature of polymerization being from about 60° to about 120° C.
Claim 5
Dependent Claim
32 words
A process according to claim 3, wherein the polymerization is carried out in an aqueous alkaline solution, and wherein the reaction medium is acidified after the last increment of epihalohydrin is reacted.
Claim 6
Dependent Claim
27 words
A process according to claim 4, wherein the epihalohydrin is epichlorohydrin, and wherein the alkylene polyamine is from the group consisting of dimethylaminopropylamine, diethylaminopropylamine, N,N-dimethylaminoethylamine, and N,N-diethylaminoethylamine.
Claim 7
Dependent Claim
32 words
A process according to claim 3, wherein the pH of the oil-containing wastewater is adjusted to from about 5.0 to about 8.0, and wherein the oil-containing wastewater is also treated with alum.
Claim 8
Dependent Claim
36 words
A process according to claim 2, wherein prior to polymer treatment, the pH of the oil-containing wastewater is adjusted to from about 5.0 to about 8.0, and wherein the oil-containing wastewater is also treated with alum.
Claim 9
Dependent Claim
27 words
A process according to claim 1, wherein te epihalohydrin is epichlorohydrin, and wherein the alkylene polyamine is from the group consisting of dimethylaminopropylamine, diethylaminopropylamine, N,N-dimethylaminoethylamine, and N,N-diethylaminoethylamine.
Claim 10
Dependent Claim
12 words
A process according to claim 8, wherein the alkylene polyamine is dimethylaminopropylamine.
Claim 11
Dependent Claim
36 words
A process according to claim 1, wherein prior to polymer treatment the pH of the oil-containing wastewater is adjusted to from about 5.0 to about 8.0, and wherein the oil-containing wastewater is also treated with alum.
Claim 12
Dependent Claim
17 words
A process according to claim 10, wherein the pH of the oil-containing wastewater is adjusted with acid.
Claim 13
Dependent Claim
12 words
A process according to claim 11, wherein the acid is sulfuric acid.
Claim 14
Dependent Claim
17 words
A process according to claim 10, wherein the pH of the oil-containing wastewater is adjusted with base.
Claim 15
Dependent Claim
11 words
A process according to claim 13, wherein the base in lime.
Claim 16
Dependent Claim
18 words
A process according to claim 10, wherein an anionic acrylamide polymer is also added to the oil-containing wastewater.
Claim 17
Dependent Claim
22 words
A process according to claim 10, wherein the pH of the oil-containing wastewater is adjusted to from about 6.0 to about 7.5
Claim 18
Dependent Claim
12 words
A process according to claim 1, wherein the oil comprises hydrocarbon oil.
Claim 19
Dependent Claim
12 words
A process according to claim 1, wherein the oil comprises petroleum oil.
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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |