Heterogeneous Lewis acid-type catalysts
AssigneeExxon Chemical Patents Inc.
InventorsFrank Joung-Yei Chen, Herve Cheradame, Jon Edmond Stanat, Gerard Rissoan
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Abstract
A solid state insoluble salt catalyst system for the carbocationic polymerization of olefin monomer in the presence of a polar or non-polar reaction medium, which comprises (a) solid state catalyst component comprising at least one salt of a strong acid and a carbocationically active transition metal selected from Groups III A, IV A, V A and VI A of the Periodic Table of Elements, wherein said salt is insoluble in the reaction medium; and (b) cocatalyst component effective for promoting the carbocationic polymerization.
Claims11
A process for the alkylation of a substrate molecule comprising:
- (a) contacting in an alkylation reaction zone said substrate molecule with an alkylating agent different from said substrate in the presence of a catalytically effective amount of at least one solid state heterogeneous insoluble acidic salt catalyst under conditions effective to alkylate said substrate, said catalyst comprising:
- (i) at least one solid state insoluble salt selected from the group consisting of the salts of a strong acid and a Group III A, Group IV A, Group VA or Group VI A transition metal selected from the group consisting of yttrium, lanthanum, zirconium, hafnium, niobium, tantalum, molybdenum and tungsten;
- and
- (ii) a cocatalyst selected from the group consisting of water, lower alkanols, alkyl halides, inorganic acids, carboxylic acids, sulfonic acids and mixtures thereof.
Dependencies are inferred from the claim text.