US4423273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of olefins from methaol and/or dimethyl ether
Assignee: BASF SE
•
Filing: 1982-07-22
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Granted: 1983-12-27
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Expires: 2002-07-22
Abstract
Abstract The process for the preparation of olefins by converting methanol and/or dimethyl ether in the presence of a zeolite catalyst is improved by treating the catalyst with hydrogen fluoride. Aluminosilicate zeolites and borosilicate zeolites, especially those of the pentasil type, are chiefly used.
Inventors
- 👤 Wolfgang Hoelderich
- 👤 Wolf D. Mross
- 👤 Matthias Schwarzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:37
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/22; B01J37/26; B01J29/00; B01J29/90; C; C07; C07C; C07C1/00; C07C1/20; C07C2529/00; C07C2529/04; C07C2529/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
34 words
A process for the preparation of olefins by converting methanol and/or dimethyl ether at elevated temperature in the presence of a zeolite catalyst which has been treated by contacting the zeolite with hydrogen fluoride.
Claim 2
Dependent Claim
34 words
A process for the preparation of olefins by converting methanol and/or dimethyl ether at elevated temperature in the presence of a zeolite catalyst which has been treated by contacting the zeolite with hydrogen fluoride.
Claim 3
Dependent Claim
17 words
A process as set forth in claim 1, wherein an aluminosilicate zeolite is used as the catalyst.
Claim 4
Dependent Claim
17 words
A process as set forth in claim 1, wherein a borosilicate zeolite is used as the catalyst.
Claim 5
Dependent Claim
43 words
A process for the preparation of olefins by converting methanol and/or dimethyl ether at elevated temperature in the presence of a pentasil zeolite catalyst, which catalyst has been treated by contacting the pentasil zeolite with a 0.001 N-1 N solution of hydrogen fluoride.
Claim 6
Dependent Claim
43 words
A process for the preparation of olefins by converting methanol and/or dimethyl ether at elevated temperature in the presence of a pentasil zeolite catalyst, which catalyst has been treated by contacting the pentasil zeolite with a 0.001 N-1 N solution of hydrogen fluoride.
Claim 7
Dependent Claim
21 words
A process as set forth in claim 4, wherein the catalyst is pre-treated with hydrogen fluoride in the reactor before use.
Claim 8
Dependent Claim
18 words
A process as set forth in claim 5, wherein the treatment is carried out with a methanolic solution.
Claim 9
Dependent Claim
47 words
A process for the preparation of olefins by converting methanol and/or dimethyl ether at from 350° to 500° C. and under a pressure from atmospheric pressure to 30 bar in the presence of an aluminosilicate zeolite of the pentasil type which has been pre-treated with hydrogen fluoride.
Claim 10
Dependent Claim
47 words
A process for the preparation of olefins by converting methanol and/or dimethyl ether at from 350° to 500° C. and under a pressure from atmospheric pressure to 30 bar in the presence of an aluminosilicate zeolite of the pentasil type which has been pre-treated with hydrogen fluoride.
Claim 11
Dependent Claim
47 words
A process for the preparation of olefins by converting methanol and/or dimethyl ether at from 400° to 500° C. and under a pressure from atmospheric pressure to 30 bar in the presence of a borosilicate zeolite of the pentasil type which has been pre-treated with hydrogen fluoride.
Claim 12
Dependent Claim
47 words
A process for the preparation of olefins by converting methanol and/or dimethyl ether at from 400° to 500° C. and under a pressure from atmospheric pressure to 30 bar in the presence of a borosilicate zeolite of the pentasil type which has been pre-treated with hydrogen fluoride.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |