Novel silicon-modified catalyst Si/HZSM-5, it's preparation, and

Details Novel silicon-modified catalyst Si/HZSM-5, it's preparation, and Novel silicon-modified catalyst Si/HZSM-5, it's preparation, and

1989-10-24

1990-08-21

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

585475, C07C 268

Patent

active

049508350

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 deposition 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: 4849386 (1989-07-01), Wang et al.

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