Patent DE322388C successfully refreshed from Google Patents.
Patent US2537598A successfully refreshed from Google Patents.
Patent US3965778A successfully refreshed from Google Patents.
Patent US3764632A successfully refreshed from Google Patents.
US3764632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxydehydrogenation process
Assignee: Nippon Kayaku Co Ltd
•
Filing: 1970-10-20
•
Granted: 1973-10-09
•
Expires: 1990-10-20
Abstract
Abstract Conjugated dienes, such as butadiene, are prepared from monoolefins, such as butene-1, by oxydehydrogenation over a catalyst represented by the following general formula:
Inventors
- 👤 S Takenaka
- 👤 A Iwamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:58
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/188; B01J27/19; B01J27/192; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8876; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
The process of claim 1, wherein said catalyst is incorporated on a silica carrier.
Claim 2
Dependent Claim
16 words
The process of claim 1, wherein the reaction is carried out in the presence of steam.
Claim 3
Dependent Claim
19 words
The process of claim 1, wherein the reaction is carried out at a temperature of from 250* to 500*C.
Claim 4
Dependent Claim
23 words
The process of claim 1, wherein said feed stream comprises steam and has a molar ratio of oxygen, steam and monoolefin of 0.25-3:1-20:1.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |