Para-selective zeolite catalysts treated with nitrogen compounds

Details Para-selective zeolite catalysts treated with nitrogen compounds Para-selective zeolite catalysts treated with nitrogen compounds

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

044775849

ABSTRACT:
A process is provided for modifying ZSM-5 type zeolite catalysts with gaseous nitrogen-based treating agents in order to enhance the para-selective properties of such catalysts for the conversion of aromatic materials to dialkyl-substituted benzene compounds. Nitrogen-based treating agents include nitrogen dioxide and ammonia. 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.

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Minachev et al., "Chemical Reviews", vol. 2, 1980, pp. 1-6 & 78.

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