US4041094A
Expired / Lapsed
US
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Method for upgrading products of Fischer-Tropsch synthesis
Assignee: Mobil Oil AS
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Filing: 1975-09-18
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Granted: 1977-08-09
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Expires: 1995-09-18
Abstract
Abstract Upgrading of Fischer-Tropsch synthesis product is obtained by separating a 560 DEG F minus hydrocarbon fraction from gaseous C5 rich material and a water phase comprising oxygenates. Alcohols may be recovered from the water phase for conversion to gasoline boiling components. C5 rich material is converted to gasoline boiling material with a ZSM-5 crystalline zeolite and upgrading of the 560 DEG F minus hydrocarbon fraction is accomplished with a ZSM-5 crystalline zeolite catalyst.
Inventors
- 👤 James C. Kuo
- 👤 Charles Dwight Prater
- 👤 John J. Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:45
CPC Classifications
C; C10; C10G; C10G59/00; C10G59/02; C10G50/00; C10G67/00; C10G67/02; C10L; C10L1/00; C10L1/04; C10L1/06; Y; Y10; Y10S; Y10S208/00; Y10S208/95
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
191 words
A method for upgrading Fischer-Tropsch synthesis products boiling below about 560° F. which comprises cooling and separating at a temperature of about 100° F a Fischer-Tropsch synthesis product boiling below about 560° F into a gaseous phase, a water phase and a hydrocarbon phase, water washing said hydrocarbon phase to recover oxygenates and combining the water phase above obtained for chemical processing, passing said hydrocarbon phase in contact with a crystalline aluminosilicate zeolite conversion catalyst that has a pore size greater than about 5 Angstroms; a silica to alumina ratio of at least 12; and a constraint index within the range of 1 to 12 under temperature conditions selected from within the range of 500° to 950° F. and a pressure selected from within the range of 0 to 300 psig to produce a gasoline product of improved octane rating, separating the product of said crystalline zeolite conversion operation and said synthesis product gaseous phase under conditions to recover an ethylene rich fraction, a gaseous components fraction suitable for conversion to gasoline boiling materials, a gasoline fraction of improved octane rating, a light fuel oil fraction and a heavier oil fraction.
Claim 2
Independent Claim
191 words
A method for upgrading Fischer-Tropsch synthesis products boiling below about 560° F. which comprises cooling and separating at a temperature of about 100° F a Fischer-Tropsch synthesis product boiling below about 560° F into a gaseous phase, a water phase and a hydrocarbon phase, water washing said hydrocarbon phase to recover oxygenates and combining the water phase above obtained for chemical processing, passing said hydrocarbon phase in contact with a crystalline aluminosilicate zeolite conversion catalyst that has a pore size greater than about 5 Angstroms; a silica to alumina ratio of at least 12; and a constraint index within the range of 1 to 12 under temperature conditions selected from within the range of 500° to 950° F. and a pressure selected from within the range of 0 to 300 psig to produce a gasoline product of improved octane rating, separating the product of said crystalline zeolite conversion operation and said synthesis product gaseous phase under conditions to recover an ethylene rich fraction, a gaseous components fraction suitable for conversion to gasoline boiling materials, a gasoline fraction of improved octane rating, a light fuel oil fraction and a heavier oil fraction.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the gaseous components fraction is processed through one of polymerization or alkylation to form gasoline boiling materials.
Claim 4
Dependent Claim
74 words
The method of claim 1 wherein the gaseous phase separated from the Fischer-Tropsch synthesis product is separated to recover a C 5 fraction separate from a C 3 -C 4 rich fraction, said C 5 rich fraction is separately processed over said crystalline zeolite conversion catalyst under conditions forming gasoline boiling range material and the products of said C 5 rich conversion operation are separated to recover gasoline boiling materials from lower boiling components.
Claim 5
Dependent Claim
48 words
The method of claim 3 wherein a C 3 -C 4 rich hydrocarbon phase is recovered from the Fischer-Tropsch synthesis gaseous phase and the products of C 5 conversion and thereafter subjected to one of catalytic polymerization or alkylation to form additional gasoline boiling materials and LPG products.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |