Para-selective zeolite catalysts treated with sulfur compounds

Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – Zsm type

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

Patent

active

044789491

ABSTRACT:
A process is provided for modifying ZSM-5 type zeolite catalysts with sulfur-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. Sulfur-based treating agents include hydrogen sulfide and sulfur dioxide. 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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