US4024201A
Expired / Lapsed
US
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Process for the selective disproportionation reaction of olefins
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1975-08-25
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Granted: 1977-05-17
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Expires: 1995-08-25
Abstract
Abstract In the disproportionation reaction of a linear olefin such as 1-butene conducted in the presence of a supported tungsten oxide catalyst such as a tungsten oxide-silica catalyst, isomerization of the olefin is inhibited and the conversion ratio for the disproportionation reaction of the olefin is increased by conducting the reaction in the presence of an amine compound such as ammonia or n-butylamine or a halogen compound such as chloroform.
Inventors
- 👤 Tadao Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:04
CPC Classifications
C; C07; C07C; C07C6/00; C07C6/02; C07C6/04; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
75 words
A process for the selective disproportionation reaction of olefins which comprises heating an olefin in a reaction zone to disproportionation temperature in the presence of a supported tungsten oxide catalyst and of an initial amount of at least one halogen compound and as the disproportionation reaction continues, introducing additional amounts of such halogen compound at least intermittently, said halogen compound being selected from the group consisting of chloroform, carbon tetrachloride, dibromomethane, 1,1-dibromoethane and butyl bromide.
Claim 2
Dependent Claim
75 words
A process for the selective disproportionation reaction of olefins which comprises heating an olefin in a reaction zone to disproportionation temperature in the presence of a supported tungsten oxide catalyst and of an initial amount of at least one halogen compound and as the disproportionation reaction continues, introducing additional amounts of such halogen compound at least intermittently, said halogen compound being selected from the group consisting of chloroform, carbon tetrachloride, dibromomethane, 1,1-dibromoethane and butyl bromide.
Claim 3
Dependent Claim
24 words
A process according to claim 1 wherein such halogen compound is present in an amount of 0.001-5 mol % based on the starting olefin.
Claim 4
Dependent Claim
19 words
A process according to claim 1 wherein said olefin is propylene, 1-butene and a mixture of 2-butene and isobutene.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein said disproportionation temperature is within the range of about 350°-500° C.
Claim 6
Dependent Claim
36 words
The process of claim 1 wherein fresh olefin is delivered continuously into contact with said catalyst and the reaction products withdrawn continuously therefrom and said additional halogen compound is introduced continuously in admixture with said olefin.
Claim 7
Dependent Claim
74 words
A process for the selective disproportionation reaction of olefins which comprises heating an olefin in a reaction zone to disproportionation temperature in the presence of a supported tungsten oxide catalyst and of an initial amount of at least one amine compound and as the disproportionation reaction continues, introducing additional amounts of said amine compound at least intermittently, said amine compound being selected from the group consisting of ammonia, n-butylamine, isobutylamine, diethylamine, triethylamine and piperidine.
Claim 8
Dependent Claim
74 words
A process for the selective disproportionation reaction of olefins which comprises heating an olefin in a reaction zone to disproportionation temperature in the presence of a supported tungsten oxide catalyst and of an initial amount of at least one amine compound and as the disproportionation reaction continues, introducing additional amounts of said amine compound at least intermittently, said amine compound being selected from the group consisting of ammonia, n-butylamine, isobutylamine, diethylamine, triethylamine and piperidine.
Claim 9
Dependent Claim
24 words
A process according to claim 6 wherein such amine compound is present in an amount of 0.001-5 mol % based on the starting olefin.
Claim 10
Dependent Claim
19 words
A process according to claim 6 wherein said olefin is propylene, 1-butene and a mixture of 2-butene and isobutene.
Claim 11
Dependent Claim
18 words
A process according to claim 6 wherein said disproportionation temperature is within the range of about 350°-500° C.
Claim 12
Dependent Claim
36 words
The process of claim 6 wherein fresh olefin is delivered continuously into contact with said catalyst and the reaction products withdrawn continuously therefrom and said additional amine compound is introduced continuously in admixture with said olefin.
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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |