Alkylation of aromatic hydrocarbons in the presence of coated zeolite catalysts
AssigneeThe Standard Oil Company
InventorsLouis J. Velenyi, Serge R. Dolhyj
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Abstract
Aromatic hydrocarbons, e.g., benzene and analogs thereof, are converted by alkylation to the corresponding alkyl aromatics by contacting the mononuclear aromatic hydrocarbon with an alkylating agent in the presence of a coated zeolite catalyst. This coated catalyst consists of an essentially inert base support having a strongly adherent outer coating containing an active catalytic zeolite material.
Claims26
A process for producing an alkyl aromatic hydrocarbon comprising contacting an aromatic hydrocarbon with an alkylating agent in the presence of a zeolite catalyst, the improvement comprising using as at least part of the catalyst a coated catalyst having:
- (a) an at least partially porous base support of at least about 20 microns in diameter, said support having an outer surface, and
- (b) a coating substantially on said outer surface, said coating consisting essentially of an active catalytic material containing a zeolite, said coating strongly adhering to said outer surface of said base support.
A process for producing an alkylated benzene comprising contacting benzene with a C.sub.2-4 alkene in the presence of zeolite catalyst, the improvement comprising using as at least part of the catalyst a coated catalyst having:
- (a) an at least partially porous base support of at least about 20 microns in diameter, said support having an outer surface, and
- (b) a coating substantially on said outer surface, said coating consisting essentially of an active catalytic material containing a zeolite, said coating strongly adhering to said outer surface of said base support.
A process for producing an alkyl aromatic hydrocarbon comprising contacting an aromatic hydrocarbon with an alkylating agent in the presence of a zeolite catalyst, the improvement comprising using as at least part of the catalyst a coated catalyst prepared by:
- A. Contacting at least a partially porous base support of at least 20 microns in diameter with an excess of liquid in such a manner that the liquid is absorbed by the support to produce a wet support;
- B. Drying the wet support to provide a partially wet support;
- C. Contacting the partially wet support with a powder of an active catalytic material containing a zeolite;
- and
- D. Gently agitating the mixture of the partially wet support and the active catalyst material containing a zeolite to produce a catalyst which has the active catalytic material strongly adhering as a coating to the outer surface of the base support.
Dependencies are inferred from the claim text.