Selective production of para-substituted benzenes

Details Selective production of para-substituted benzenes Selective production of para-substituted benzenes

1977-05-03

1978-07-11

Gantz, Delbert E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260671C, C07C 352

Patent

active

041002172

ABSTRACT:
Process for the selective production of para-substituted benzene derivatives characterized by the formula: ##STR1## where R.sub.1 and R.sub.2 are individually methyl or ethyl by alkylation of a mono alkyl benzene wherein the alkyl substituent contains 1 or 2 carbon atoms, i.e. toluene or ethylbenzene, with a methylating or ethylating agent in the presence of a catalyst comprising the crystalline aluminosilicate zeolite ZSM-23. The products selectively produced are para-xylene, para-ethyltoluene or para-diethylbenzene.

REFERENCES:
patent: 3751506 (1973-08-01), Burress
patent: 3965207 (1976-06-01), Weinstein
patent: 3992466 (1976-11-01), Plank et al.

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