US4060568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silica-modified zeolite catalyst and conversion therewith
Assignee: Mobil Oil AS
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Filing: 1976-03-31
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Granted: 1977-11-29
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Expires: 1996-03-31
Abstract
Abstract A catalyst is provided, which is especially applicable for the selective production of certain desired hydrocarbons, comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index, as hereinafter defined, within the approximate range of 1 to 12 and having contained within the interior crystalline structure thereof added amorphous silica in an amount of at least about 0.1 and preferably between about 2 and about 10 weight percent. The invention described herein also encompasses synthesis of the specified catalyst and use of the same in selectively producing low molecular weight olefins and/or para-xylene from appropriate charge stocks.
Inventors
- 👤 Paul G. Rodewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:36
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/123; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/76; C07C2/86; C07C2/862; C07C2/864; C07C4/00; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; B01J2229/00; B01J2229/10; B01J2229/12; B01J2229/26; B01J2229/30; B01J2229/32; B01J2229/34; B01J2229/36; B01J2229/42; B01J29/65; B01J29/70; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/65; C07C2529/70; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y10; Y10S; Y10S423/00; Y10S423/22; Y10S423/23; Y10S423/29; Y10S423/33; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
A process for producing a hydrocarbon mixture rich in C 2 -C 3 olefins which comprises contacting, under conversion conditions, a charge consisting essentially of one or more lower monohydric alcohols having up to four carbon atoms, the ethers derived therefrom or mixtures of said alcohols and ethers with a catalyst composition comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index within the approximate range of 1 to 12 and containing interdispersed within the interior crystalline structure thereof added amorphous silica in an amount of at least about 0.1 weight percent.
Claim 2
Dependent Claim
101 words
A process for producing a hydrocarbon mixture rich in C 2 -C 3 olefins which comprises contacting, under conversion conditions, a charge consisting essentially of one or more lower monohydric alcohols having up to four carbon atoms, the ethers derived therefrom or mixtures of said alcohols and ethers with a catalyst composition comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index within the approximate range of 1 to 12 and containing interdispersed within the interior crystalline structure thereof added amorphous silica in an amount of at least about 0.1 weight percent.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the amount of added amorphous silica is between about 2 and about 10 weight percent.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is ZSM-5.
Claim 5
Dependent Claim
41 words
The process of claim 1 wherein said conversion conditions include a temperature of about 250 to about 600° C., a pressure from about 0.2 to about 30 atmospheres and a liquid hourly space velocity of between about 0.1 and about 20.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein said charge is methanol, dimethyl ether or mixtures thereof.
Claim 7
Dependent Claim
41 words
The process of claim 5 wherein said conversion conditions include a temperature of about 250° C. and about 600° C., a pressure between about 0.2 and about 30 atmospheres and a liquid hourly space velocity between about 0.1 and about 20.
Claim 8
Dependent Claim
21 words
The process of claim 5 wherein said zeolite has a crystal size within the approximate range of 0.02 to 0.05 micron.
References Cited (Backward Citations)
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US3244766A
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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) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |