Zeolite catalysts modified with Group VI A metal

Details Zeolite catalysts modified with Group VI A metal Zeolite catalysts modified with Group VI A metal

1984-01-05

1985-07-30

Dees, Carl F.

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

Zeolite or clay, including gallium analogs

And additional al or si containing component

502 77, B01J 2936

Patent

active

045322260

ABSTRACT:
A modified zeolite catalyst composition is provided for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified prior to use by treatment with compounds of the Group VI A metals (Cr, Mo, W), and optionally phosphorus, followed by conversion of these elements to the oxide form, thereby incorporating these oxides into the crystal structure of the zeolite. This modification enhances the ability of the zeolite to selectively catalyze the production of the 1,4-dialkylbenzene isomer.

REFERENCES:
patent: 3759821 (1973-09-01), Brennan et al.
patent: 3875081 (1975-04-01), Young
patent: 3945913 (1976-03-01), Brennan et al.
patent: 3965208 (1976-06-01), Butter et al.
patent: 4002698 (1977-01-01), Kaeding
patent: 4176050 (1979-11-01), Chen et al.
patent: 4250345 (1981-02-01), Chu
patent: 4259537 (1981-03-01), Chu

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