US4564603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidative-dehydrogenation catalyst and process
Assignee: Union Oil Company of California
•
Filing: 1984-10-31
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Granted: 1986-01-14
•
Expires: 2004-10-31
Abstract
Abstract Oxidative dehydrogenation catalysts suitable for converting C 4 to C 8 mono-olefins to conjugated dienes comprise vanadium, phosphorus, and alkali metal components, and preferably also a tin component, in combination with a microporous crystalline silica or a crystalline zeolite having a silica-to-alumina ratio of at least 6.0. In one embodiment, the catalyst has a surface area between 30 M 2 /g to 450 M 2 /g and the vanadium has an average valence in the range of from 3.50 to 4.95.
Inventors
- 👤 Paul R. Robinson
- 👤 Eric L. Moorehead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:28
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; C; C07; C07C; C07C5/00; C07C5/42; C07C5/48
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
32 words
An oxidative dehydrogenation catalyst comprising components of vanadium, phosphorus, and an alkali metal in combination with a microporous crystalline silica or a crystalline zeolite having a silica-to-alumina ratio of at least 6.0.
Claim 2
Dependent Claim
32 words
An oxidative dehydrogenation catalyst comprising components of vanadium, phosphorus, and an alkali metal in combination with a microporous crystalline silica or a crystalline zeolite having a silica-to-alumina ratio of at least 6.0.
Claim 3
Dependent Claim
17 words
An oxidative dehydrogenation catalyst as defined in claim 1 wherein said catalyst contains a crystalline aluminosilicate zeolite.
Claim 4
Dependent Claim
24 words
An oxidative dehydrogenation catalyst as defined in claim 1 wherein said catalyst contains a crystalline aluminosilicate zeolite of silica-to-alumina ratio of at least 10.0.
Claim 5
Independent Claim
73 words
A method of preparing an oxidative dehydrogenation catalyst which comprises: (A) contacting a vanadium compound and a phosphorus compound and an alkali metal compound with an acidic, aqueous medium and a divalent tin compound under reaction conditions which provide vanadium having an average valence of from +3.50 to +4.95 to form a catalyst precursor; (B) mixing the catalyst precursor with a carrier material; and (C) calcining the resultant mixture at an elevated temperature.
Claim 6
Independent Claim
73 words
A method of preparing an oxidative dehydrogenation catalyst which comprises: (A) contacting a vanadium compound and a phosphorus compound and an alkali metal compound with an acidic, aqueous medium and a divalent tin compound under reaction conditions which provide vanadium having an average valence of from +3.50 to +4.95 to form a catalyst precursor; (B) mixing the catalyst precursor with a carrier material; and (C) calcining the resultant mixture at an elevated temperature.
Claim 7
Dependent Claim
29 words
A method as defined in claim 4 wherein said carrier material contains a microporous crystalline silica or a crystalline aluminosilicate zeolite having a silica-to-alumina ratio of at least 6.0.
Claim 8
Dependent Claim
28 words
A method as defined in claim 5 wherein said catalyst contains a crystalline aluminosilicate zeolite of silica-to-alumina ratio of at least 10.0, and said medium contains an alcohol.
Claim 9
Dependent Claim
22 words
A catalyst as defined in claim 1 wherein said catalyst contains a crystalline aluminosilicate zeolite of silica-to-alumina ratio of at least 12.0
Claim 10
Dependent Claim
22 words
A catalyst as defined in claim 1 wherein said catalyst contains a crystalline aluminosilicate zeolite of silica-to-alumina ratio of at least 20.0.
Claim 11
Dependent Claim
25 words
A catalyst as defined in claim 1 wherein said catalyst contains a crystalline aluminosilicate zeolite of silica-to-alumina ratio no greater than about 150 to 1.
Claim 12
Dependent Claim
12 words
A catalyst as defined in claim 1 further comprising a tin component.
Claim 13
Dependent Claim
12 words
A catalyst as defined in claim 2 further comprising a tin component.
Claim 14
Dependent Claim
12 words
A catalyst as defined in claim 3 further comprising a tin component.
Claim 15
Dependent Claim
12 words
A catalyst as defined in claim 7 further comprising a tin component.
Claim 16
Dependent Claim
12 words
A catalyst as defined in claim 9 further comprising a tin component.
Claim 17
Dependent Claim
28 words
An oxidative-dehydrogenation catalyst comprising components of vanadium, phosphorus, and one or more alkali metals, with the atomic ratio of total alkali metals to phosphorus being above about 0.4:1.0.
Claim 18
Dependent Claim
28 words
An oxidative-dehydrogenation catalyst comprising components of vanadium, phosphorus, and one or more alkali metals, with the atomic ratio of total alkali metals to phosphorus being above about 0.4:1.0.
Claim 19
Dependent Claim
17 words
A catalyst as defined in claim 15 wherein said atomic ratio is no greater than about 1:1.
Claim 20
Dependent Claim
10 words
A catalyst as defined in claim 16 further containing tin.
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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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |