US4347225A
Expired / Lapsed
US
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Method for treating alkaline effluents resulting from petroleum processing
Assignee: Mobil Oil AS
•
Filing: 1981-02-26
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Granted: 1982-08-31
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Expires: 2001-02-26
Abstract
Abstract The present invention is a method for treating alkaline effluents resulting from petroleum processing by incinerating the effluents in the presence of oxygen and a sufficient amount of hydrogen sulfide fuel to convert the alkaline material to the corresponding sulfate.
Inventors
- 👤 Costandi A. Audeh
- 👤 Saverio G. Greco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:18
CPC Classifications
C; C01; C01D; C01D5/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
35 words
A method for treating alkaline effluents resulting from petroleum processing comprising incinerating said effluents in the presence of oxygen and a sufficient amount of hydrogen sulfide to convert the alkaline material to the corresponding sulfate.
Claim 2
Independent Claim
35 words
A method for treating alkaline effluents resulting from petroleum processing comprising incinerating said effluents in the presence of oxygen and a sufficient amount of hydrogen sulfide to convert the alkaline material to the corresponding sulfate.
Claim 3
Dependent Claim
15 words
A method as in claim 1 wherein said effluent comprises spent sodium hydroxide treating solution.
Claim 4
Dependent Claim
18 words
A method as in claim 1 wherein said hydrogen sulfide comprises a component of a refinery stream off-gas.
Claim 5
Independent Claim
39 words
A method for treating alkaline effluents resulting from petroleum processing comprising incinerating said effluents in the presence of oxygen and sufficient amount of hydrogen sulfide and an auxiliary sulfur-containing fuel to convert the alkaline material to the corresponding sulfate.
Claim 6
Independent Claim
39 words
A method for treating alkaline effluents resulting from petroleum processing comprising incinerating said effluents in the presence of oxygen and sufficient amount of hydrogen sulfide and an auxiliary sulfur-containing fuel to convert the alkaline material to the corresponding sulfate.
Claim 7
Dependent Claim
14 words
A method as in claim 4 wherein said auxiliary fuel comprises sulfur-containing fuel oil.
Claim 8
Dependent Claim
19 words
A method as in claim 5 wherein said fuel oil comprises a fuel oil fraction prior to extensive hydrodesulfurization.
Claim 9
Dependent Claim
18 words
A method as in claim 1 or claim 4 wherein said effluent comprises spent potassium hydroxide treating solution.
Claim 10
Dependent Claim
29 words
A method as in claim 1 or claim 4 wherein said incineration process comprises combusting said effluent at a temperature of from about 700° C. to about 1750° C.
Claim 11
Dependent Claim
14 words
A method as in claim 8 wherein said combustion temperature is about 1250° C.
References Cited (Backward Citations)
SU281273A1
Cited
US1807528A
Cited
US1929675A
Cited
US4073871A
Cited
US4154607A
Cited
US4270468A
Cited
US4237103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |