US4180516A
Expired / Lapsed
US
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Conversion of synthesis gas to aromatic hydrocarbons
Assignee: Mobil Oil AS
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Filing: 1977-08-18
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Granted: 1979-12-25
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Expires: 1997-08-18
Abstract
Abstract Synthesis gas is converted to aromatic hydrocarbons over an intimate mixture of catalysts comprising a first component of Zno-Cr2O3 mixed catalyst, characterized by catalytic activity for the reduction by hydrogen of carbon monoxide, wherein the Zn.Cr atomic ratio is less than about 4:1 and a second component selected from a selective class of acidic crystalline aluminosilicates having a silica:alumina ratio greater than 12:1 and a pore dimension greater than about 5 Angstroms.
Inventors
- 👤 Clarence D. Chang
- 👤 William H. Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:19
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/48; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C; C07; C07C; C07C1/00; C07C1/02; C07C1/04; C07C1/0425; C07C1/043; C07C2523/00; C07C2523/06; C07C2523/16; C07C2523/24; C07C2523/26; C07C2529/00; C07C2529/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
138 words
In the process of converting synthesis gas, comprising carbon monoxide and hydrogen, to an aromatic hydrocarbon product by contacting the synthesis gas at about 500° to 900° F. with a heterogenous catalyst comprising as a first component a carbon monoxide reduction catalyst and as a second component an aromatizing crystalline aluminosilicate zeolite having a silica to alumina ratio of at least 12 and a constraint index of about 1 to 12; the improvement which comprises utilizing as the carbon monoxide reducing catalyst component a mixed catalyst selected from the groups consisting of ZnO-Cr 2 O 3 having a Zn:Cr atomic ratio less than about 4:1 alone or in admixture with a binder selected from the group consisting of alumina, zirconia, silica, titania and magnesia and thereby substantially increasing the conversion of said synthesis gas to aromatic hydrocarbon products.
Claim 2
Dependent Claim
138 words
In the process of converting synthesis gas, comprising carbon monoxide and hydrogen, to an aromatic hydrocarbon product by contacting the synthesis gas at about 500° to 900° F. with a heterogenous catalyst comprising as a first component a carbon monoxide reduction catalyst and as a second component an aromatizing crystalline aluminosilicate zeolite having a silica to alumina ratio of at least 12 and a constraint index of about 1 to 12; the improvement which comprises utilizing as the carbon monoxide reducing catalyst component a mixed catalyst selected from the groups consisting of ZnO-Cr 2 O 3 having a Zn:Cr atomic ratio less than about 4:1 alone or in admixture with a binder selected from the group consisting of alumina, zirconia, silica, titania and magnesia and thereby substantially increasing the conversion of said synthesis gas to aromatic hydrocarbon products.
Claim 3
Dependent Claim
28 words
The method of claim 1 wherein the ZnO-Cr 2 O 3 mixed catalyst component comprises from about 1 to about 95 weight percent of the heterogeneous catalyst mixture.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein the Zn:Cr atomic ratio of the ZnO-Cr 2 O 3 mixed catalyst component is within the range from about 3.8:1 to 0:1.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein said ZnO-Cr 2 O 3 component and said crystalline aluminosilicate are in the same particle.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein said ZnO-Cr 2 O 3 component and said crystalline aluminosilicate are in separate particles.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein said crystalline aluminosilicate is selected from a class of crystalline zeolites comprising ZSM-5, ZSM-11, ZSM-12, ZSM-35 and ZSM-38.
Claim 8
Dependent Claim
23 words
The method of claim 1 wherein the synthesis gas hydrogen to carbon oxides volume ratio is maintained within the range of from 0.2-6.0.
Claim 9
Dependent Claim
10 words
The method of claim 1 wherein the binder is alumina.
References Cited (Backward Citations)
BE828228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |