Para-selective zeolite catalysts

Details Para-selective zeolite catalysts Para-selective zeolite catalysts

1981-11-19

1983-12-13

Dees, Carl F.

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

Zsm type

502 85, B01J 3710, B01J 2928, B01J 2718

Patent

active

044204183

ABSTRACT:
A process is provided for treating modified ZSM-5 type zeolite catalysts with carboxylic acid (or anhydride) and water vapor treating agents in order to enhance the para-selective properties of such catalysts for the alkylation of aromatic materials without significantly diminishing catalyst activity. The modified zeolites so treated are those which contain a minor proportion of a difficulty reducible oxide such as magnesium oxide, calcium oxide and/or phosphorus oxide. Such catalyst compositions can be used in alkylation processes to provide alkylated aromatic product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.

REFERENCES:
patent: 3493490 (1970-02-01), Plank et al.
patent: 3684738 (1972-08-01), Chen
patent: 3972832 (1976-08-01), Butter et al.
patent: 4002698 (1977-01-01), Kaeding
patent: 4034053 (1977-07-01), Kaeding et al.
patent: 4274982 (1981-06-01), Chu

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