US3816274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of dissolved or suspended solids in waste water
Assignee: TETRA RESOURCES Inc A CORP OF
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Filing: 1971-10-20
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Granted: 1974-06-11
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Expires: 1991-10-20
Abstract
Abstract Waste water containing oil and water emulsions and dissolved or suspended solids is de-emulsified and clarified by creating a three dimensional anolyte stream resulting from the careful placement of anodes and impressing direct or galvanic current through the water. Waste water is first contacted with an anode system in a restricted zone so as to give substantially all of the waste water a rapid pH change of several units and is then conveyed to a second zone wherein a three dimensional anolyte stream is formed causing the oily particles to float to the surface of the water where they can be skimmed off.
Inventors
- 👤 H Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:28
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/02; B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/047; B01D17/06; C02; C02F; C02F1/00; C02F1/52; C02F1/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
The process of claim 1 wherein the first and second zones are sections of a substantially rectangular container and flowing the emulsion through a series of rod-shaped anodes in the first zone, flowing the emulsion in an upward direction up and over a baffle, and flowing the emulsion to the second zone containing a plurality of rod-shaped anodes positioned substantially perpendicular to the anodes of the first zone and thereafter separating a fat phase from a clarified water phase.
Claim 2
Dependent Claim
29 words
The process of claim 1 wherein the pH of the solution in the immediate neighborhood of the anodes in the first zone is between about 1 and about 3.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein a flocculating agent is added to the solution to aid in making solids rise to the surface.
Claim 4
Dependent Claim
36 words
The process of claim 4 wherein the flocculating agent is a copolymer of from 90-50 weight percent acrylamide or methacrylamide and from 10 to 50 weight percent acrylic or methacrylic acid or water soluble salt thereof.
Claim 5
Dependent Claim
19 words
The process of claim 1 wherein acid is added to the solution to aid in breaking the fat-water emulsion.
Claim 6
Dependent Claim
16 words
The process of claim 1 wherein the anolyte stream has a pH of below about 4.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |