Novel silicon-modified catalyst Si/HZSM-5 preparation

Details Novel silicon-modified catalyst Si/HZSM-5 preparation Novel silicon-modified catalyst Si/HZSM-5 preparation

1987-03-27

1989-07-18

Dees, Carl F.

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

Including organic component

502 71, B01J 2928

Patent

active

048493864

ABSTRACT:
This invention relates to the preparation of a novel Si/HZSM-5 catalyst through vapor phase deposition of Si on the surface of HZSM-5 catalyst which is obtained by ion exchanging ZSM-5 catalyst. The source of depositing Si comes from tetraalkyl ortho-silicate (or tetra-alkoxy silane), Si(OR)4, wherein R represents the alkyl group that contains 1-4 carbon atoms. The silicon deposit will substantially not clog the pores of the catalyst.
The present invention is to make use of the modified catalyst in the alkylation or disproportionation reactions in order to enhance the yield of p-dialkylbenzene as an ingredient in the final product of aryl compounds such as toluene or ethylbenzene.

REFERENCES:
patent: 3725302 (1973-04-01), Shimely et al.
patent: 4138363 (1979-02-01), Hertzenberg et al.
patent: 4477583 (1984-10-01), Rodewald

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