Para selectivity in catalyzed disubstitutions of monosubstituted

Details Para selectivity in catalyzed disubstitutions of monosubstituted Para selectivity in catalyzed disubstitutions of monosubstituted

1986-04-24

1988-06-28

Gron, Teddy S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568939, C07C 7910

Patent

active

047540834

ABSTRACT:
Para selectivity in the conversion of a monosubstituted benzene containing a meta-directing group to disubstituted benzenes can be substantially enhanced by carrying out the reaction in the gas phase with an inorganic or organic substitution agent in the presence of a catalyst composition comprising a crystalline molecular sieve material. In particular, nitrobenzene can be converted using nitrogen dioxide in the gas phase to a product containing an augmented proportion of para-dinitrobenzene using a wide range of catalyst compositions comprising both synthetic and naturally occurring crystalline molecular sieve materials such as ferrierites, X-type zeolites, Y-type zeolites, silicalite, framework-modified silicalites, ZSM aluminosilicates, AMS-1B borosilicates, and AlPO.sub.4 types.

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patent: 4551568 (1985-11-01), Sato et al.
patent: 4642396 (1987-02-01), Can et al.

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