Patent US4550218A successfully refreshed from Google Patents.
US4550218A
Expired / Lapsed
US
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Hydrocarbon synthesis with zeolite catalyst of improved hydrothermal stability
Assignee: Mobil Oil AS
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Filing: 1985-03-08
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Granted: 1985-10-29
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Expires: 2005-03-08
Abstract
Abstract The hydrothermal stability of zeolites is improved by incorporating Group IB metal cations preferably Ag into the zeolite. The improved stability is useful in processes in which the zeolite is frequently exposed to water vapor at elevated temperature, for example, in processes where water is produced in the reaction or in the catalyst regeneration.
Inventors
- 👤 Pochen Chu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:04
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; B; B01; B01J; B01J2229/00; B01J2229/10; B01J2229/24; B01J2229/30; B01J2229/40; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/44; B01J29/70; B01J29/72; B01J29/74; B01J29/7415; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/70; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
90 words
In a catalytic process for the conversion of a feed consisting essentially of oxygenated compounds selected from the group consisting of methanol, dimethyl ether, and ethanol wherein at least one of said oxygenated compounds is contacted at elevated temperatures and pressures with a crystalline aluminosilicate zeolite selected from the group consisting of large pore zeolites and zeolites having a Constraint Index of from 1 to 12 in order to convert the feed to hydrocarbons, the improvement which comprises employing as the catalyst a zeolite containing a Group IB metal cation.
Claim 2
Dependent Claim
90 words
In a catalytic process for the conversion of a feed consisting essentially of oxygenated compounds selected from the group consisting of methanol, dimethyl ether, and ethanol wherein at least one of said oxygenated compounds is contacted at elevated temperatures and pressures with a crystalline aluminosilicate zeolite selected from the group consisting of large pore zeolites and zeolites having a Constraint Index of from 1 to 12 in order to convert the feed to hydrocarbons, the improvement which comprises employing as the catalyst a zeolite containing a Group IB metal cation.
Claim 3
Dependent Claim
13 words
The process of claim 1 wherein the Group I metal cation is silver.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the oxygenated feed is methanol.
Claim 5
Dependent Claim
12 words
The process of claim 1 wherein the oxygenated feed is dimethyl ether.
Claim 6
Dependent Claim
11 words
The process of claim 1 wherein the oxygenated feed is ethanol.
Claim 7
Dependent Claim
15 words
A method according to claim 1 in which the zeolite is a large pore zeolite.
Claim 8
Dependent Claim
13 words
A method according to claim 1 in which the zeolite is zeolite beta.
Claim 9
Dependent Claim
19 words
A method according to claim 7 in which the zeolite beta has a silica:alumina ratio of at least 30:1.
Claim 10
Dependent Claim
29 words
A method according to claim 1 in which the zeolite comprises a zeolite having a Constraint Index of 1 to 12 and a silica:alumina ratio of at least 12:1.
Claim 11
Dependent Claim
18 words
A method according to claim 9 in which the zeolite has a silica:aluminia ratio of at least 40:1.
Claim 12
Dependent Claim
21 words
A method according to claim 9 in which the content of Group I metal cations is at least 0.5 weight percent.
Claim 13
Dependent Claim
21 words
A method according to claim 10 in which the content of Group I metal cations is at least 0.5 weight percent.
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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) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |