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

1981-06-26

1983-01-25

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

585475, C07C 268

Patent

active

043705081

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.

REFERENCES:
patent: 3853743 (1974-12-01), Schwartz
patent: 4152364 (1979-05-01), Chu
patent: 4326994 (1982-04-01), Haag et al.

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