Catalysts and process for olefin conversion
AssigneePhillips Petroleum Company
InventorsCharles A. Drake, Robert E. Reusser
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Abstract
A process for disproportionation of olefins is disclosed employing a novel catalyst comprising a silica support treated with an oxide or oxide precursor of tungsten and a Group I oxide or compound convertible to the oxide in admixture with a double bond isomerization catalyst.
Claims11
A process comprising contacting at least one olefin selected from the group consisting of acyclic mono- and polyenes having at least 3 carbon atoms per molecule and cycloalkyl and aryl derivatives thereof;
- cyclic mono- and polyenes having at least 4 carbon atoms per molecule and alkyl and aryl derivatives thereof;
- mixtures of two or more of the above olefins;
- and mixtures of ethylene with one or more of the above olefins capable of undergoing disproportionation with a combined catalyst consisting essentially of:
- (a) a first catalyst component consisting essentially of:
- (i) a silica support,
- (ii) an oxide of tungsten or a precursor of an oxide of tungsten, and
- (iii) a Group I oxide or compound convertible to the oxide;
- and
- (b) a second catalyst component consisting essentially of a double bond isomerization catalyst in admixture with said first catalyst component.
A process according to claim 3 wherein said combined catalyst is further treated under reducing conditions at about 400.degree.-750.degree. C. for about 1 minute to about 30 hours prior to contacting said at least one olefin with said combined catalyst.
A process comprising contacting at least one olefin selected from the group consisting of acyclic mono- and polyenes having at least 3 carbon atoms per molecule and cycloalkyl and aryl derivatives thereof;
- cyclic mono- and polyenes having at least 4 carbon atoms per molecule and alkyl and aryl derivatives thereof;
- mixtures of two or more of the above olefins;
- and mixtures of ethylene with one or more of the above olefins capable of undergoing disproportionation with a combined catalyst consisting essentially of:
- (a) a first catalyst component consisting essentially of:
- (i) a silica support with a surface area of at least about 10 m.sup.2 /g, about 0.2 wt. % or less aluminum, measured as Al.sub.2 O.sub.3 and about 0.2 wt. % or less sodium, measured as Na.sub.2 O,
- (ii) at least about 0.1 wt. % of tungsten oxide (WO.sub.3) based on the combined weight of tungsten oxide and silica support, and
- (iii) about 0.01 to about 10 wt. % of potassium hydroxide calculated as the oxide and based on the combined weight of potassium oxide and silica support;
- and
- (b) a second catalyst component consisting essentially of magnesium oxide;
- wherein said first catalyst component and said second catalyst component are admixed in a weight ratio of about 1:0.5 to about 1:20.
Dependencies are inferred from the claim text.