Para-selective zeolite catalysts treated with carbon dioxide

Details Para-selective zeolite catalysts treated with carbon dioxide Para-selective zeolite catalysts treated with carbon dioxide

1982-08-30

1984-10-16

Meros, Edward J.

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

Zeolite or clay, including gallium analogs

Zsm type

502 60, 502 64, 502 71, 502 85, B01J 2906, B01J 2928, B01J 2714

Patent

active

044775857

ABSTRACT:
A process is provided for modifying ZSM-5 type zeolite catalysts with carbon dioxide treating agent in order to enhance the para-selective properties of such catalysts for the conversion of aromatic materials to dialkyl-substituted benzene compounds. Catalyst compositions so treated can be used in alkylation, transalkylation or disproportionation processes to provide product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.

REFERENCES:
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patent: 3444097 (1969-05-01), Barclay
patent: 3702886 (1972-11-01), Argaler et al.
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patent: 4137195 (1979-01-01), Chu
patent: 4250345 (1981-02-01), Chu
Minachev et al., "Chemistry Reviews", vol. 2, 1980, pp. 1-44, 78 and 79.

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