US4372878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of an aluminum silicate catalyst for converting methanol containing water and/or dimethyl ether containing water into lower olefins
Assignee: Hoechst AG
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Filing: 1981-03-02
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Granted: 1983-02-08
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Expires: 2001-03-02
Abstract
Abstract The process according to the invention comprises silanizing an aluminum silicate and then heating the product to 300° to 600° C. in the presence of oxygen or of gases containing oxygen. A highly selective catalyst which can be regenerated very many times is thereby obtained.
Inventors
- 👤 Friedrich Wunder
- 👤 Ernst I. Leupold
- 👤 Horst Hachenberg
- 👤 Hans-Joachim Schmidt
- 👤 Klaus Unger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:56
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/08; B01J37/082; B01J37/086; B01J29/00; B01J29/04; B01J29/06; B01J29/50; C; C07; C07C; C07C1/00; C07C1/20; B01J2229/00; B01J2229/10; B01J2229/12; B01J2229/30; B01J2229/32; B01J2229/40; C07C2521/00; C07C2521/12; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
52 words
A process for the preparation of a crystalline zeolite catalyst for converting methanol containing water and/or dimethyl ether containing water into lower olefins, which comprises silanizing a naturally occurring chabazite/erionite mixture and subsequently heating the product to 300° C. to 600° C. in the presence of oxygen or of gases containing oxygen.
Claim 2
Dependent Claim
52 words
A process for the preparation of a crystalline zeolite catalyst for converting methanol containing water and/or dimethyl ether containing water into lower olefins, which comprises silanizing a naturally occurring chabazite/erionite mixture and subsequently heating the product to 300° C. to 600° C. in the presence of oxygen or of gases containing oxygen.
Claim 3
Dependent Claim
17 words
A process as claimed in claim 1, wherein the heating temperature is 350° C. to 500° C.
References Cited (Backward Citations)
US3682996A
Cited
US4145315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |