Patent US4062905A successfully refreshed from Google Patents.
US4062905A
Expired / Lapsed
US
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Manufacture of light olefins
Assignee: Mobil Oil AS
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Filing: 1976-12-06
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Granted: 1977-12-13
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Expires: 1996-12-06
Abstract
Abstract A catalytic process is provided for converting a charge consisting essentially of methanol, dimethyl ether or mixtures thereof to a hydrocarbon product rich in ethylene and propylene by contact, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite characterized by pores, the major dimension of which is less than 6 Angstroms and the capability, under said conditions, of producing less than 20 weight percent methane in said hydrocarbon product.
Inventors
- 👤 Clarence D. Chang
- 👤 William H. Lang
- 👤 Anthony J. Silvestri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:19
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/50; C07C2529/70; Y; Y02; Y02P; Y02P30/00; Y02P30/20; Y02P30/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
124 words
A catalytic process for converting a charge consisting essentially of methanol, dimethyl ether or mixtures thereof to a hydrocarbon product rich in ethylene and propylene which comprises contacting said charge under conversion conditions including a temperature between about 500° F and about 1100° F, a pressure from about 0.2 to 30 atmospheres and a liquid hourly space velocity of between about 0.1 and about 200 with a catalyst comprising a crystalline aluminosilicate zeolite characterized by pores, the major dimension of which is less than 6 Angstroms, further characterized by pore windows of about a size such as would be provided by 8-membered rings of oxygen atoms and the capability, under said conditions, of producing less than 20 weight percent methane in said hydrocarbon product.
Claim 2
Dependent Claim
124 words
A catalytic process for converting a charge consisting essentially of methanol, dimethyl ether or mixtures thereof to a hydrocarbon product rich in ethylene and propylene which comprises contacting said charge under conversion conditions including a temperature between about 500° F and about 1100° F, a pressure from about 0.2 to 30 atmospheres and a liquid hourly space velocity of between about 0.1 and about 200 with a catalyst comprising a crystalline aluminosilicate zeolite characterized by pores, the major dimension of which is less than 6 Angstroms, further characterized by pore windows of about a size such as would be provided by 8-membered rings of oxygen atoms and the capability, under said conditions, of producing less than 20 weight percent methane in said hydrocarbon product.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein ethylene and propylene constitute a major proportion of the reaction product.
Claim 4
Dependent Claim
37 words
The process of claim 1 wherein the amount of ethylene and propylene produced is in excess of 35 weight percent and the amount of methane produced is not more than 10 weight percent of the reaction product.
Claim 5
Dependent Claim
30 words
The process of claim 1 wherein at least 10 percent of the cationic sites of said crystalline aluminosilicate zeolite are occupied by ions other than alkali or alkaline earth metals.
Claim 6
Dependent Claim
16 words
The process of claim 4 wherein said ions are ammonium, hydrogen, rare earth or combinations thereof.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is predominantly in the hydrogen form.
Claim 8
Dependent Claim
16 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is contained in a matrix therefor.
Claim 9
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is erionite.
Claim 10
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is chabazite.
Claim 11
Dependent Claim
13 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is zeolite T.
Claim 12
Dependent Claim
13 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is dealuminized erionite.
Claim 13
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is ZK-5.
References Cited (Backward Citations)
US3894106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |