US4111792A
Expired / Lapsed
US
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Combination process for upgrading synthol naphtha fractions
Assignee: Mobil Oil AS
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Filing: 1977-02-11
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Granted: 1978-09-05
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Expires: 1997-02-11
Abstract
Abstract Fischer-Tropsch synthol naptha is upgraded to high octane gasoline with minimum yield loss in a multistep process comprising fractionating the synthol naptha to give a C 5 + C 6 fraction and C 7 + fraction, processing the C 5 + C 6 fraction over a ZSM-5 catalyst under dense phase conditions, pretreating and reforming the C 7 + fraction under conventional conditions, and blending the C 5 + products from both the C 5 + C 6 and C 7 + processing steps.
Inventors
- 👤 Philip D. Caesar
- 👤 William E. Garwood
- 👤 William F. Krudewig
- 👤 John J. Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:08
CPC Classifications
C; C10; C10G; C10G59/00; C10G59/06; C10G35/00; C10G35/04; C10G35/06; C10G35/095; C10L; C10L1/00; C10L1/04; C10L1/06; Y; Y10; Y10S; Y10S208/00; Y10S208/95
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
181 words
A method for upgrading the C 5 + liquid product of a Fischer-Tropsch synthesis having an end-point from about 340° to 400° F which comprises: (a) fractionating said liquid product to separate a C 5 + C 6 fraction and a C 7 + fraction; (b) reforming the C 7 + fraction to produce a C 5 + reformate; (c) containing the C 5 + C 6 fraction in the absence of added hydrogen with a crystalline aluminosilicate characterized by a pore dimension greater than about 5 Angstroms, a silica to alumina ratio of at least 12, a constraint index within the range of 1 to 12 at dense phase process conditions of a temperature of about 325° to 500° F, a pressure of about 200 to 1000 psig, and a LHSV of about 0.1 to 5.0; and (d) recovering a C 5 gasoline product boiling up to about 400° F having an enhanced octane value from the dense phase processed C 5 + C 6 fraction; and (e) blending said C 5 + reformate with said C 5 gasoline product.
Claim 2
Independent Claim
181 words
A method for upgrading the C 5 + liquid product of a Fischer-Tropsch synthesis having an end-point from about 340° to 400° F which comprises: (a) fractionating said liquid product to separate a C 5 + C 6 fraction and a C 7 + fraction; (b) reforming the C 7 + fraction to produce a C 5 + reformate; (c) containing the C 5 + C 6 fraction in the absence of added hydrogen with a crystalline aluminosilicate characterized by a pore dimension greater than about 5 Angstroms, a silica to alumina ratio of at least 12, a constraint index within the range of 1 to 12 at dense phase process conditions of a temperature of about 325° to 500° F, a pressure of about 200 to 1000 psig, and a LHSV of about 0.1 to 5.0; and (d) recovering a C 5 gasoline product boiling up to about 400° F having an enhanced octane value from the dense phase processed C 5 + C 6 fraction; and (e) blending said C 5 + reformate with said C 5 gasoline product.
Claim 3
Dependent Claim
40 words
The process of claim 1 wherein the C 5 + C 6 fraction is contacted with the crystalline aluminosilicate at a temperature of about 400° F, a pressure of about 600-700 psig, and a LHSV of about 0.1 to 2.0.
Claim 4
Independent Claim
179 words
A method for upgrading the C 5 + liquid product of a Fischer-Tropsch synthesis having an end-point from about 340° to 400° F which comprises: (a) fractionating the liquid product to separate a C 5 + C 6 fraction and a C 7 + fraction; (b) pretreating the C 7 + fraction by mild hydrogenation over a Co/Mo/Alumina catalyst; (c) catalytically reforming the C 7 + fraction to produce a C 5 + reformate; (d) contacting the C 5 + C 6 fraction in the absence of added hydrogen with a crystalline aluminosilicate selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-21, ZSM-35, and ZSM-38 at dense phase process conditions of a temperature of about 325° to 500° F, a pressure of 600 to 700 psig, and a LHSV of about 0.1 to 5.0; and (e) recovering a C 5 gasoline product boiling up to about 400° F having an enhanced octane value from the dense phase processed C 5 + C 6 fraction; and (f) blending said C 5 + reformate with said C 5 gasoline product.
Claim 5
Independent Claim
179 words
A method for upgrading the C 5 + liquid product of a Fischer-Tropsch synthesis having an end-point from about 340° to 400° F which comprises: (a) fractionating the liquid product to separate a C 5 + C 6 fraction and a C 7 + fraction; (b) pretreating the C 7 + fraction by mild hydrogenation over a Co/Mo/Alumina catalyst; (c) catalytically reforming the C 7 + fraction to produce a C 5 + reformate; (d) contacting the C 5 + C 6 fraction in the absence of added hydrogen with a crystalline aluminosilicate selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-21, ZSM-35, and ZSM-38 at dense phase process conditions of a temperature of about 325° to 500° F, a pressure of 600 to 700 psig, and a LHSV of about 0.1 to 5.0; and (e) recovering a C 5 gasoline product boiling up to about 400° F having an enhanced octane value from the dense phase processed C 5 + C 6 fraction; and (f) blending said C 5 + reformate with said C 5 gasoline product.
Claim 6
Dependent Claim
46 words
The process of claim 3 wherein the C 5 + gasoline product recovered from the dense phase processed C 5 + C 6 fraction is hydrotreated prior to blending with the C 5 + reformate to produce a deoxygenated, gasoline boiling product of enhanced octane value.
Claim 7
Dependent Claim
20 words
The process of claim 3 wherein the crystalline aluminosilicate zeolite has been base exchanged with hydrogen ions or ammonium ions.
Claim 8
Dependent Claim
10 words
The process of claim 3 wherein the zeolite is ZSM-5.
Claim 9
Dependent Claim
18 words
The process of claim 5 wherein the zeolite is ZSM-5 which is composited with an inorganic oxide binder.
Claim 10
Dependent Claim
10 words
The process of claim 7 wherein the binder is alumina.
Claim 11
Dependent Claim
42 words
The process of claim 1 wherein a C 5 gasoline product boiling up to about 400° F having an enhanced octane value and a 400° F+ fuel oil product are recovered from the dense phase processed C 5 + C 6 fraction.
Claim 12
Dependent Claim
42 words
The process of claim 3 wherein at C 5 gasoline product boiling up to about 400° F having an enhanced octane value and a 400° F+ fuel oil product are recovered from the dense phase processed C 5 + C 6 fraction.
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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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |