EP0042252A1
Expired / Lapsed
EP
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Isobutene by dehydroisomerisation of normal butane
Assignee: BP PLC
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Filing: 1981-06-10
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Granted: —
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Expires: 2001-06-10
Abstract
Abstract Isobutene unprepared from n-butane by dehydroisomerisation at 350-700°C in the presence of a catalyst comprising an element of group IIIa of the periodic system (e.g. gallium) on a support. The isobutene can be separated from the reaction products by etherification with methanol.
Inventors
- 👤 Alexander John Bp Chemicals Limited Kolombos
- 👤 Clive David The British Petroleum Co Ltd Telford
- 👤 Dennis The British Petroleum Co. Ltd. Young
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 04:24
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C11/08; C07C11/09; C07C5/00; C07C5/32; C07C5/373
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
A process for dehydroisomerisation of a hydrocarbon feedstock containing normal butane to iso-butene which comprises bringing the feedstock at an elevated temperature into contact with a catalyst composition comprising an element from Group IIIa of the Periodic Table or a compound thereof in combination with a support of OC-value below 45.
Claim 2
Dependent Claim
51 words
A process for dehydroisomerisation of a hydrocarbon feedstock containing normal butane to iso-butene which comprises bringing the feedstock at an elevated temperature into contact with a catalyst composition comprising an element from Group IIIa of the Periodic Table or a compound thereof in combination with a support of OC-value below 45.
Claim 3
Dependent Claim
15 words
A process according to claim 1 wherein a gallium compound is deposited on a support.
Claim 4
Dependent Claim
13 words
A process according to claim 2 wherein the gallium compound is gallium oxide.
Claim 5
Dependent Claim
20 words
A process according to claim 1 wherein gallium ions from a gallium compound are exchanged with cations on the support.
Claim 6
Dependent Claim
21 words
A process according to any one of the preceding claims wherein the support is selected from silica, alumina, and a silicate.
Claim 7
Dependent Claim
23 words
A process according to claim 5 wherein the support is a zeolite selected from aluminosilicates, a silicalite, a metal tectosilicate and a boralite.
Claim 8
Dependent Claim
29 words
A process according to any one of the preceding claims wherein the concentration of gallium in the catalyst composition is between 0.05 and 20% by weight of the support.
Claim 9
Dependent Claim
37 words
A process according to any one of the preceding claims wherein the dehydroisomerisation reaction is carried out by passing the feedstock in the vapour phase over the catalyst composition maintained at a temperature between 350° and 700°C.
Claim 10
Dependent Claim
28 words
A process according to any one of the preceding claims wherein the isobutene formed is separated from the dehydroisomerisation reaction products by conversion thereof into methyl tertiarybutyl ether.
Claim 11
Dependent Claim
22 words
A process according to claim 9 wherein the conversion to methyl tertiarybutyl ether is achieved by reacting the dehydroisomerisation products with methanol.
References Cited (Backward Citations)
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