Patent US3697613A successfully refreshed from Google Patents.
US3697613A
Expired / Lapsed
US
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Dismutation of olefins
Assignee: Texas Petrochemicals Corp
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Filing: 1969-04-28
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Granted: 1972-10-10
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Expires: 1989-04-28
Abstract
Abstract Isobutylene and a second C3 -C20 monoolefin can be reacted (dismutation) over an alumina supported catalyst of the oxide of molybdenum, tungsten or rhenium modified with fluoride ion in the form of a soluble salt in a weight ratio of fluoride ion to metal oxide in the range of 0.065:1 to 0.20:1 to produce different olefinic product than the starting olefins. For example, isobutylene is reacted with 2-butene over a MoO3, NaF (F :MoO3 ratio 0.175:1) at 150* C. to give 30 percent conversion of isobutylene aNd 15 percent selectivity to 2-methyl-2-butene which is the immediate precursor of isoprene (widely used in the preparation of synthetic rubber).
Inventors
- 👤 Robert P Arganbright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:38
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/12; C; C07; C07C; C07C6/00; C07C6/02; C07C6/04
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
15 words
The process according to claim 1 wherein the support is at least 95 percent alumina.
Claim 2
Dependent Claim
13 words
The process according to claim 2 wherein the catalyst composition is molybdenum oxide.
Claim 3
Dependent Claim
18 words
The process according to claim 3 wherein the temperature is in the range of 125* to 150* C.
Claim 4
Dependent Claim
18 words
The process according to claim 4 wherein the temperature is in the range of 80* to 100* C.
Claim 5
Dependent Claim
16 words
The process according to claim 4 wherein the acyclic monoolefin has up to 10 carbon atoms.
Claim 6
Dependent Claim
16 words
The process according to claim 6 wherein the acyclic monoolefin has up to six carbon atoms.
Claim 7
Dependent Claim
12 words
The process according to claim 7 wherein the acyclic monoolefin is 2-butene.
Claim 8
Dependent Claim
13 words
The process according to claim 2 wherein the catalyst composition is tungsten oxide.
Claim 9
Dependent Claim
18 words
The process according to claim 9 wherein the temperature is in the range of 250* to 400* C.
Claim 10
Dependent Claim
18 words
The process according to claim 10 wherein the temperature is in the range of 300* to 350* C.
Claim 11
Dependent Claim
16 words
The process according to claim 10 wherein the acyclic monoolefin has up to 10 carbon atoms.
Claim 12
Dependent Claim
16 words
The process according to claim 12 wherein the acyclic monoolefin has up to six carbon atoms.
Claim 13
Dependent Claim
12 words
The process according to claim 13 wherein the acyclic monoolefin is 2-butene.
Claim 14
Dependent Claim
13 words
The process according to claim 2 wherein the catalyst composition is rhenium oxide.
Claim 15
Dependent Claim
18 words
The process according to claim 15 wherein the temperature is in the range of 20* to 80* C.
Claim 16
Dependent Claim
18 words
The process according to claim 16 wherein the temperature is in the range of 25* to 50* C.
Claim 17
Dependent Claim
16 words
The process according to claim 16 wherein the acyclic monoolefin has up to 10 carbon atoms.
Claim 18
Dependent Claim
16 words
The process according to claim 18 wherein the acyclic monoolefin has up to six carbon atoms.
Claim 19
Dependent Claim
12 words
The process according to claim 20 wherein the acyclic monoolefin is 2-butene.
Claim 20
Dependent Claim
80 words
A process for the preparation of 2-methyl-2-butene comprising contacting 2-methyl-1-propene and 2-butene in the presence of a catalytic composition selected from the group consisting of molybdenum oxide, tungsten oxide and rhenium oxide on a support of at least 75 percent alumina, said catalyst incorporating fluoride ion in a weight ratio of fluoride ion to molybdenum oxide, tungsten or rhenium oxide in a range of about 0.065:1 to 0.20:1 at a dismutation temperature in the range of 20* to 400* C.
Claim 21
Dependent Claim
15 words
The process according to claim 21 wherein the support is at least 95 percent alumina.
Claim 22
Dependent Claim
13 words
The process according to claim 22 wherein the catalyst composition is molybdenum oxide.
Claim 23
Dependent Claim
13 words
The process according to claim 22 wherein the catalyst composition is tungsten oxide.
Claim 24
Dependent Claim
13 words
The process according to claim 22 wherein the catalyst composition is rhenium oxide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |