US4234402A
Expired / Lapsed
US
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Sulfur removal from crude petroleum
Assignee: Individual
•
Filing: 1978-10-24
•
Granted: 1980-11-18
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Expires: 1998-10-24
Abstract
Abstract A process for decreasing the sulfur content of coal or crude petroleum is provided, which includes drying coal and subjecting the dried coal in a hydrogen atmosphere to the influence of wave energy in the microwave range.
Inventors
- 👤 Chalmer G. Kirkbride
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:49
CPC Classifications
C; C10; C10G; C10G32/00; B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/126; C10G1/00; C10L; C10L9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
32 words
Process for reducing the sulfur content of crude petroleum which comprises subjecting a mixture of said crude petroleum having a free moisture content below 0.5 weight percent and hydrogen to microwave energy.
Claim 2
Dependent Claim
32 words
Process for reducing the sulfur content of crude petroleum which comprises subjecting a mixture of said crude petroleum having a free moisture content below 0.5 weight percent and hydrogen to microwave energy.
Claim 3
Dependent Claim
29 words
Process for reducing the sulfur content of crude petroleum which comprises drying said crude petroleum and subjecting a mixture of the dried crude petroleum and hydrogen to microwave energy.
Claim 4
Dependent Claim
29 words
Process for reducing the sulfur content of crude petroleum which comprises drying said crude petroleum and subjecting a mixture of the dried crude petroleum and hydrogen to microwave energy.
Claim 5
Dependent Claim
19 words
Process according to claim 2 wherein said dried crude petroleum has a free moisture content below 0.5 weight percent.
Claim 6
Dependent Claim
66 words
Process for reducing the sulfur content of crude petroleum which comprises drying said crude petroleum and subjecting a mixture of the dried crude petroleum and hydrogen to microwave energy at a temperature of from about 40° F. to about 300° F. for a time of not more than ten minutes, and recovering a petroleum liquid having a reduced sulfur content as a product of the process.
Claim 7
Dependent Claim
66 words
Process for reducing the sulfur content of crude petroleum which comprises drying said crude petroleum and subjecting a mixture of the dried crude petroleum and hydrogen to microwave energy at a temperature of from about 40° F. to about 300° F. for a time of not more than ten minutes, and recovering a petroleum liquid having a reduced sulfur content as a product of the process.
Claim 8
Dependent Claim
21 words
Process according to claim 4 wherein said crude petroleum is contacted with microwave energy in the presence of a hydrogenation catalyst.
Claim 9
Dependent Claim
16 words
Process according to claim 4 wherein the microwave energy is comprised of at least two frequencies.
Claim 10
Dependent Claim
18 words
Process according to claim 4 wherein the microwave energy is comprised of at least two frequencies applied simultaneously.
Claim 11
Dependent Claim
18 words
Process according to claim 4 wherein the microwave energy is comprised of at least two frequencies applied consecutively.
References Cited (Backward Citations)
US3616375A
Cited
US3503865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-18 | 1984-05-19 | 1984-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-18 | 1988-05-19 | 1988-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-18 | 1992-05-19 | 1992-11-18 | $7700.00 | Window Closed / Lapsed |