US4247731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of lower alkenes from methanol and/or dimethyl ether
Assignee: Hoechst AG
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Filing: 1979-09-17
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Granted: 1981-01-27
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Expires: 1999-09-17
Abstract
Abstract Lower alkenes, especially ethylene, are produced from methanol and/or dimethyl ether in the presence of aluminum silicate catalysts containing manganese and possibly further co-catalysts.
Inventors
- 👤 Friedrich Wunder
- 👤 Hans-Jurgen Arpe
- 👤 Horst Hachenberg
- 👤 Ernst I. Leupold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:20
CPC Classifications
C; C10; C10G; C10G3/00; C10G3/42; C10G3/44; C10G3/48; C10G3/49; C07; C07C; C07C1/00; C07C1/20; C07C2529/00; C07C2529/04; C07C2529/06; C10G2300/00; C10G2300/40; C10G2300/4006; C10G2300/4012; C10G2400/00; C10G2400/20; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y02P30/00; Y02P30/20; Y02P30/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
32 words
Process for the manufacture of lower alkenes which comprises reacting methanol and/or dimethyl ether on aluminum silicate catalysts containing from 0.1 to 10% by weight of manganese, calculated on the aluminum silicate.
Claim 2
Dependent Claim
32 words
Process for the manufacture of lower alkenes which comprises reacting methanol and/or dimethyl ether on aluminum silicate catalysts containing from 0.1 to 10% by weight of manganese, calculated on the aluminum silicate.
Claim 3
Dependent Claim
32 words
The process of claim 1, wherein the catalyst contains in addition elements of the 1st or 2nd main group or of the 2nd or 3rd subgroup of the Periodic Table as co-catalysts.
Claim 4
Dependent Claim
14 words
The process of claim 1, wherein the catalyst contains in addition magnesium as co-catalyst.
Claim 5
Dependent Claim
13 words
The process of claim 1, wherein crystalline aluminum silicate is used as catalyst.
Claim 6
Dependent Claim
15 words
The process of claim 1, wherein the reaction pressure is from 1 to 100 bars.
Claim 7
Dependent Claim
15 words
The process of claim 1, wherein the reaction temperature is from 300° to 500° .
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |