US4410751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of olefins from a lower alcohol or dimethyl ether
Assignee: DIRECTOR-GENERALL OF AGENCY OF INDUSTRIAL SCIENCE AND TECHNOLOGY
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Filing: 1982-03-12
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Granted: 1983-10-18
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Expires: 2002-03-12
Abstract
Abstract A lower alcohol, especially methanol, or dimethyl ether is subjected to pyrolysis conditions in the presence of a specific catalyst to obtain lower olefins. The catalyst is comprised of a smectite, such as a montmorillonite clay, having superimposed aluminosilicate layers and zirconium oxide intercalated between the structural, aluminosilicate layers.
Inventors
- 👤 Shigemitsu Shin
- 👤 Kunio Suzuki
- 👤 Yoshimichi Kiyozumi
- 👤 Kiyoshi Ogawa
- 👤 Haruo Takaya
- 👤 Kenichiro Bando
- 👤 Yasuo Takami
- 👤 Yasuhiko Kohtoku
- 👤 Hideo Watanabe
- 👤 Kichinari Kawamura
- 👤 Yuzi Shimazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:58
CPC Classifications
C; C07; C07C; C07C1/00; C07C1/20; C07C2521/00; C07C2521/06; C07C2521/16
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
42 words
A process for subjecting methanol or dimethyl ether to pyrolysis to obtain olefins, comprising contacting a gas stream containing methanol or dimethyl ether with a catalyst which comprises a smectite composed of superimposed aluminosilicate layers, and zirconium oxide intercalated between said layers.
Claim 2
Dependent Claim
42 words
A process for subjecting methanol or dimethyl ether to pyrolysis to obtain olefins, comprising contacting a gas stream containing methanol or dimethyl ether with a catalyst which comprises a smectite composed of superimposed aluminosilicate layers, and zirconium oxide intercalated between said layers.
Claim 3
Dependent Claim
27 words
A process as claimed in claim 1, wherein said smectite is a clay mineral selected from the group consisting of montmorillonite, beidellite, nontronite, saponite, hectorite and sauconite.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1, wherein said smectite is that contained in bentonite or terra abla.
Claim 5
Dependent Claim
14 words
A process as claimed in claim 1, wherein said smectite is a synthetic smectite.
Claim 6
Dependent Claim
20 words
A process as claimed in claim 1, wherein said catalyst has a basal spacing at between 14.6 and 18.8 Å.
Claim 7
Dependent Claim
46 words
A process as claimed in claim 1, wherein said catalyst has a specific surface area of between about 10 and 500 m 2 /g, a pore volume of between about 0.1 and 0.4 cc/g and an average pore diameter of between about 3 and 10 Å.
Claim 8
Dependent Claim
54 words
A process as claimed in claim 1, wherein said catalyst is obtained by a method which comprises the steps of: mixing a smectite with an aqueous solution containing a zirconium compound capable of providing hydroxy-zirconium cation to exchange the cations of the smectite with the hydroxy-zirconium cation; and drying and calcining the hydroxy-zirconium-carrying smectite.
Claim 9
Dependent Claim
36 words
A process as claimed in claim 1, wherein said contact is carried out at a temperature of between 200° and 500° C. and an hourly liquid space velocity of between 0.1 and 20 Hr -1 .
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |