US4046829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the Fischer-Tropsch synthesis product distribution
Assignee: Mobil Oil AS
•
Filing: 1975-08-04
•
Granted: 1977-09-06
•
Expires: 1995-08-04
Abstract
Abstract The product of Fischer-Tropsch Synthesis is separated to recover a product boiling above and below about 400 DEG F which is thereafter separately process over different beds of ZSM-5 crystalline zeolite under conditions promoting the formation of fuel oil products and gasoline of a higher octane rating.
Inventors
- 👤 Henry R. Ireland
- 👤 Thomas R. Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:42
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06; C10G; C10G3/00; C10G3/42; C10G3/44; C10G3/45; C10G3/46; C10G3/48; C10G3/49; C10G35/00; C10G35/04; C10G35/06; C10G35/095; C10G2300/00; C10G2300/10; C10G2300/1022; C10G2300/107; C10G2300/20; C10G2300/30; C10G2300/301; C10G2400/00; C10G2400/02; Y; Y02; Y02P; Y02P30/00; Y02P30/20; Y10; Y10S; Y10S208/00; Y10S208/95
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
197 words
A method of forming hydrocarbons from carbon monoxide and hydrogen which comprises: passing carbon monoxide and hydrogen in contact with a Fischer-Tropsch synthesis carbon monoxide reduction catalyst under temperature and pressure conditions promoting the formation of hydrocarbons and oxygenates, separating the Fischer-Tropsch synthesis product into a hydrocarbon fraction boiling below about 400° F. and a hydrocarbon fraction boiling above about 400° F., passing said hydrocarbon fraction boiling below about 400° F. in contact with a crystalline zeolite that has a pore diameter greater than about 5 angstroms; a silica to alumina ratio of at least 12; a constraint index within the range of 1-12; under temperature and pressure conditions promoting the formation of gasoline boiling range products of higher octane rating, passing said hydrocarbon fraction boiling above 400° F. sequentially in contact with a hydrogenation catalyst maintained under relatively mild hydrogenation conditions and then in contact with a crystalline zeolite that has a pore diameter greater than about 5 angstroms; a silica to alumina ratio of at least 12; a constraint index within the range of 1-12; maintained under conditions to convert said hydrocarbon fraction to a lower boiling fuel oil product of reduced pour point, and
Claim 2
Independent Claim
197 words
A method of forming hydrocarbons from carbon monoxide and hydrogen which comprises: passing carbon monoxide and hydrogen in contact with a Fischer-Tropsch synthesis carbon monoxide reduction catalyst under temperature and pressure conditions promoting the formation of hydrocarbons and oxygenates, separating the Fischer-Tropsch synthesis product into a hydrocarbon fraction boiling below about 400° F. and a hydrocarbon fraction boiling above about 400° F., passing said hydrocarbon fraction boiling below about 400° F. in contact with a crystalline zeolite that has a pore diameter greater than about 5 angstroms; a silica to alumina ratio of at least 12; a constraint index within the range of 1-12; under temperature and pressure conditions promoting the formation of gasoline boiling range products of higher octane rating, passing said hydrocarbon fraction boiling above 400° F. sequentially in contact with a hydrogenation catalyst maintained under relatively mild hydrogenation conditions and then in contact with a crystalline zeolite that has a pore diameter greater than about 5 angstroms; a silica to alumina ratio of at least 12; a constraint index within the range of 1-12; maintained under conditions to convert said hydrocarbon fraction to a lower boiling fuel oil product of reduced pour point, and
Claim 3
Dependent Claim
28 words
recovering gasoline boiling range products from each of said crystalline zeolite conversion operations of a higher octane rating than the octane rating of gasoline product of Fischer-Tropsch synthesis.
Claim 4
Dependent Claim
28 words
recovering gasoline boiling range products from each of said crystalline zeolite conversion operations of a higher octane rating than the octane rating of gasoline product of Fischer-Tropsch synthesis.
References Cited (Backward Citations)
US3790471A
Cited
US3671419A
Cited
US3684694A
Cited
US3729409A
Cited
US3760024A
Cited
US3926782A
Cited
US3843510A
Cited
US3960978A
Cited
US3928483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |