Patent US3669949A successfully refreshed from Google Patents.
US3669949A
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Oxydehydrogenation process
Assignee: Atlantic Richfield Co
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Filing: 1969-07-28
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Granted: 1972-06-13
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Expires: 1989-07-28
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
- 👤 Jin Sun Yoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:00
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/24; B01J31/2404; B01J31/2409; B01J31/02; B01J31/12; B01J31/14; B01J31/143; B01J31/1616; C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/842; B01J2531/845; C07C2521/00; C07C2521/12; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22; C07C2531/24
Claims Analysis
Total Claims: 6
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
16 words
The process of claim 1, wherein said monoolefin comprises butene, and said conjugated diene is butadiene.
Claim 5
Dependent Claim
16 words
The process of claim 1, wherein said monoolefin comprises isopentene and said conjugated diene is isoprene.
Claim 6
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |