Patent US4025571A successfully refreshed from Google Patents.
US4025571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of hydrocarbons
Assignee: Mobil Oil AS
•
Filing: 1976-05-12
•
Granted: 1977-05-24
•
Expires: 1996-05-12
Abstract
Abstract A catalytic process is provided for converting a C1-C4 monohydric alcohol, an ether derived from said alcohol or a mixture of such alcohol and ether to a hydrocarbon mixture rich in C2-C3 olefins and mononuclear aromatics with high selectivity for para-xylene production by contact, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite having a crystal size of at least about 1 micron, a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12.
Inventors
- 👤 Rudolph M. Lago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:11
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
98 words
A process for producing hydrocarbons 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 comprising a crystalline aluminosilicate zeolite having a crystal size of at least about one micron, a silica to alumina ratio of about 12 and a constraint index within the approximate range of 1 to 12 to yield a reaction product mixture comprising C 2 -C 3 olefins, monocyclic aromatic hydrocarbons and water and recovering said hydrocarbons.
Claim 2
Dependent Claim
98 words
A process for producing hydrocarbons 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 comprising a crystalline aluminosilicate zeolite having a crystal size of at least about one micron, a silica to alumina ratio of about 12 and a constraint index within the approximate range of 1 to 12 to yield a reaction product mixture comprising C 2 -C 3 olefins, monocyclic aromatic hydrocarbons and water and recovering said hydrocarbons.
Claim 3
Dependent Claim
43 words
The process of claim 1 wherein said conversion conditions include a temperature of from about 500° F. to about 950° F., a pressure from about 0.2 to about 50 atmospheres and a weight hourly space velocity of between about 1 and about 100.
Claim 4
Dependent Claim
43 words
The process of claim 1 wherein said conversion conditions include a temperature of from about 600° F. to about 850° F., a pressure from about 1 to about 30 atmospheres and a weight hourly space velocity of between about 2 and about 40.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said charge is methanol, dimethyl ether or mixtures thereof.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is ZSM-5.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein said crystalline aluminosilicate zeolite is ZSM-5 predominately in the hydrogen form.
Claim 8
Dependent Claim
24 words
The process of claim 1 wherein the crystal size of said crystalline aluminosilicate zeolite is within the approximate range of 1 to 20 microns.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein the crystal size of said crystalline aluminosilicate zeolite is within the approximate range of 1 to 6 microns.
Claim 10
Dependent Claim
16 words
The process of claim 5 wherein the ZSM-5 is present in combination with a binder therefor.
References Cited (Backward Citations)
US3140249A
Cited
US3178365A
Cited
US3140251A
Cited
US3728408A
Cited
US3894106A
Cited
US3894107A
Cited
US3894103A
Cited
US3894105A
Cited
US3928483A
Cited
US3979472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |