US4280959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidative dehydrogenation of alkenes or alkadienes to furan compounds
Assignee: ISP Investments LLC
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Filing: 1980-09-22
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Granted: 1981-07-28
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Expires: 2000-09-22
Abstract
Abstract Alkenes and/or alkadienes are contacted with molecular oxygen and an oxidative dehydrogenation catalyst consisting essentially of silver, phosphorus and oxygen, with the silver-to-phosphorus atom ratio being in the range of about 0.25:1 to about 10:1 to produce furan compounds.
Inventors
- 👤 R. Parthasarathy
- 👤 Eugene V. Hort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:33
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/34; C07D307/36; B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; B01J27/00; B01J27/14; B01J27/16; B01J27/18; B01J27/1802; B01J27/1817
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
188 words
A process which comprises reacting at least one usaturated acyclic feed hydrocarbon selected from the group consisting of alkenes and alkadienes having from 4 to 10 carbon atoms, with oxygen in contact with a catalyst composition consisting essentially of silver, phosphorus and oxygen, with the silver-to-phosphorus atom ratio being in the range of 0.25:1 to about 10:1, under suitable vapor-phase reaction conditions for the conversion of said at least one unsaturated acyclic feed hydrocarbon to at least one furan compound having the formula ##STR2## wherein each R is individually selected from the group consisting of hydrogen and alkyl radicals having from 1 to 6 carbon atoms, the total carbon atoms in the R radicals being in the range of 0 to 6; and recovering at least a portion of the furan compounds thus produced, wherein said reaction conditions comprise a temperature in the range of about 200° C. to about 600° C., an unsaturated acyclic hydrocarbon feed rate in the range of about 10 to about 1000 GHSV, and a mol ratio of oxygen to unsaturated acyclic feed hydrocarbon in the range of about 0.1:1 to about 3:1.
Claim 2
Dependent Claim
188 words
A process which comprises reacting at least one usaturated acyclic feed hydrocarbon selected from the group consisting of alkenes and alkadienes having from 4 to 10 carbon atoms, with oxygen in contact with a catalyst composition consisting essentially of silver, phosphorus and oxygen, with the silver-to-phosphorus atom ratio being in the range of 0.25:1 to about 10:1, under suitable vapor-phase reaction conditions for the conversion of said at least one unsaturated acyclic feed hydrocarbon to at least one furan compound having the formula ##STR2## wherein each R is individually selected from the group consisting of hydrogen and alkyl radicals having from 1 to 6 carbon atoms, the total carbon atoms in the R radicals being in the range of 0 to 6; and recovering at least a portion of the furan compounds thus produced, wherein said reaction conditions comprise a temperature in the range of about 200° C. to about 600° C., an unsaturated acyclic hydrocarbon feed rate in the range of about 10 to about 1000 GHSV, and a mol ratio of oxygen to unsaturated acyclic feed hydrocarbon in the range of about 0.1:1 to about 3:1.
Claim 3
Dependent Claim
24 words
A process in accordance with claim 1 wherein said feed hydrocarbon comprises at least one acyclic alkadiene having from 4 to 5 carbon atoms.
Claim 4
Dependent Claim
22 words
A process in accordance with claim 2 wherein said silver-to-phosphorous atom ratio is in the range of about 0.5:1 to about 8:1.
Claim 5
Dependent Claim
23 words
A process in accordance with claim 3 wherein said feed hydrocarbon comprises butadiene and said composition further consists essentially of a solid support.
References Cited (Backward Citations)
US3271459A
Cited
US3716545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |