Patent US4279830A successfully refreshed from Google Patents.
US4279830A
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Conversion of synthesis gas to hydrocarbon mixtures utilizing dual reactors
Assignee: Mobil Oil AS
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Filing: 1979-06-01
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Granted: 1981-07-21
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Expires: 1999-06-01
Abstract
Abstract The conversion of less than 1 H2/CO ratio syngas to high yield of C3 plus product is accomplished with a CO reducing catalyst comprising shift characteristics and the product of Fischer-Tropsch synthesis is converted to premium gasoline and distillate fuels by contact with acidic ZSM-5 zeolite. The syngas conversion may be accomplished in any catalyst system permitting a very close temperature control on the exotherm encountered and the gasoline-distillate yield relationship may be varied as a function of temperature and pressure.
Inventors
- 👤 Werner O. Haag
- 👤 Tracy J. Huang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:34
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0455; C07C1/046; C07C1/0485; C10; C10G; C10G3/00; C10G3/42; C10G3/44; C10G3/48; C10G3/49; C10G3/54; C10L; C10L1/00; C10L1/04; C10L1/06; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/70; C07C2523/74; C07C2523/745; C07C2523/76; C07C2523/78; C10G2300/00; C10G2300/10; C10G2300/1022; C10G2300/40; C10G2300/4006; C10G2300/4012; C10G2300/4018; C10G2300/80; C10G2300/805; C10G2400/00; C10G2400/02; Y; Y02; Y02P; Y02P30/00; Y02P30/20; Y10; Y10S; Y10S208/00; Y10S208/95
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
187 words
In a process for converting syngas to carbon compounds comprising oxygenates and hydrocarbon products wherein syngas is contacted with an iron-containing Fischer-Tropsch catalyst at a temperature with the range of 400° to 600° F. and a pressure within the range of 1-1500 psig so as to achieve high conversion of said syngas to substantial amounts of C 3 + carbon compounds comprising no more than 20% methane plus ethane, and all or a portion of the product of said syngas conversion is passed in contact with an acidic crystalline zeolite having a pore dimension greater than 5 Angstroms, a silica-to-alumina ratio of at least 12, and a constraint index within the range of 1-12 at a temperature of 530°-850° F., a pressure from about 1 atmosphere to about 800 psig, and at a space velocity of from about 0.2 to 30 WHSV so as to promote the formation of gasoline and distillate materials; the improvement which comprises increasing the rate of syngas conversion by maintaining a H 2 /CO ratio in the range of 0.5 to 1 and achieving an overall syngas conversion of greater than 60%.
Claim 2
Dependent Claim
187 words
In a process for converting syngas to carbon compounds comprising oxygenates and hydrocarbon products wherein syngas is contacted with an iron-containing Fischer-Tropsch catalyst at a temperature with the range of 400° to 600° F. and a pressure within the range of 1-1500 psig so as to achieve high conversion of said syngas to substantial amounts of C 3 + carbon compounds comprising no more than 20% methane plus ethane, and all or a portion of the product of said syngas conversion is passed in contact with an acidic crystalline zeolite having a pore dimension greater than 5 Angstroms, a silica-to-alumina ratio of at least 12, and a constraint index within the range of 1-12 at a temperature of 530°-850° F., a pressure from about 1 atmosphere to about 800 psig, and at a space velocity of from about 0.2 to 30 WHSV so as to promote the formation of gasoline and distillate materials; the improvement which comprises increasing the rate of syngas conversion by maintaining a H 2 /CO ratio in the range of 0.5 to 1 and achieving an overall syngas conversion of greater than 60%.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the acidic crystalline zeolite is ZSM5.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein water is charged with the syngas passed in contact with the CO reducing catalyst.
Claim 5
Dependent Claim
35 words
The process of claim 2 wherein conversion of the syngas produces C 1 to C 40 carbon compounds and the total product effluent of the Fischer-Tropsch operation is passed in contact with the zeolite catalyst.
Claim 6
Dependent Claim
34 words
The process of claim 2 wherein the conversion of syngas is accomplished in more than one CO reduction zone and at least one zone employs the CO reduction catalyst suspended in a liquid medium.
Claim 7
Dependent Claim
32 words
The process of claim 2 wherein the products of Fischer-Tropsch synthesis comprise hydrocarbon and oxygenates which are separated and separately processed over said special zeolite catalyst to produce gasoline and distillate product.
Claim 8
Dependent Claim
43 words
The process of claim 2 wherein the high conversion of the syngas feed produces less than 20% methane plus ethane, the yield of C 3 plus products is at least 80% and the yield of C 5 plus products is at least 45%.
Claim 9
Dependent Claim
22 words
The process of claim 2 wherein the H 2 /CO ratio of the syngas is within the range of 0.6 to 0.8.
Claim 10
Dependent Claim
29 words
The process of claim 2 wherein the conversion of syngas by said Fischer-Tropsch catalyst is accomplished in an elongated reaction zone comprising suspended catalyst particles in a liquid medium.
Claim 11
Dependent Claim
38 words
The process of claim 2 wherein conversion of syngas by said Fischer-Tropsch catalyst is accomplished in the presence of a fixed bed of catalyst particles retained in an elongated tubular reaction zone surrounded by a heat exchange medium.
Claim 12
Dependent Claim
36 words
The process of claim 2 wherein the conversion of the low ratio syngas is effected in at least two separate catalyst zones in series and the removal of formed CO 2 is accomplished between catalyst zones.
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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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |