Patent US3620971A successfully refreshed from Google Patents.
US3620971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breaking refinery sewer oil and water emulsions with sodium bicarbonate
Assignee: Chevron USA Inc
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Filing: 1970-08-21
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Granted: 1971-11-16
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Expires: 1990-08-21
Abstract
Abstract Refinery sewer system emulsions containing oil, water and sediment are broken by the use of sodium bicarbonate.
Inventors
- 👤 Oliver Plumbar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:45
CPC Classifications
C; C10; C10G; C10G33/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
The process of claim 1 wherein said treated emulsion is heated to a temperature of from about 170* F. to about 210* F.
Claim 2
Dependent Claim
24 words
The process of claim 1 wherein said sodium bicarbonate is added in a quantity of more than 2 pounds per barrel of said emulsion.
Claim 3
Dependent Claim
39 words
The process of claim 1 wherein said sodium bicarbonate is added to the emulsion so that the quantity of the sodium bicarbonate in the treated emulsion is between about 2 to about 5 pounds per barrel of said emulsion.
Claim 4
Dependent Claim
91 words
A process for breaking refinery sewer oil, water and solid emulsions which are removed from refinery sewer system settling tanks containing from about 40 to 99 percent basic sediment and water as determined by American Petroleum Institute Test No. 2542, said emulsions being those emulsions which remain after subjecting the refinery sewer system effluent to heating and settling, which comprises adding to the emulsion sodium bicarbonate to form a treated emulsion, heating said treated emulsion, and allowing the heated and treated emulsion to separate into separate oil, water and solid layers.
Claim 5
Dependent Claim
65 words
A process for breaking a refinery sewer oil, water and solid emulsion containing from about 60 to 90 percent basic sediment and water as determined by American Petroleum Institute Test No. 2542, which comprises adding to the emulsion sodium bicarbonate to form a treated emulsion, heating said treated emulsion, and allowing the heated and treated emulsion to separate into separate oil, water and solid layers.
References Cited (Backward Citations)
US1223659A
Cited
US2074183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |