Zeolite catalysts of improved activity and para-selectivity

Details Zeolite catalysts of improved activity and para-selectivity Zeolite catalysts of improved activity and para-selectivity

1985-03-04

1985-10-22

Dees, Carl F.

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

Zeolite or clay, including gallium analogs

Activating treatment

502 77, B01J 2928

Patent

active

045489149

ABSTRACT:
A method is provided for treating modified ZSM-5 type zeolite catalysts with water vapor in order to enhance the aromatics conversion activity and/or the para-selective properties of such catalysts for the conversion of aromatic materials. The modified zeolites so treated are those which contain a minor proportion of a difficultly reducible oxide such as magnesium oxide, calcium oxide and/or phosphorus oxide. Such catalyst compositions can be used in alkylation, transalkylation or disproportionation processes to provide improved yields of alkylated aromatic product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.

REFERENCES:
patent: 3972832 (1976-08-01), Butter et al.
patent: 4137195 (1979-01-01), Chu
patent: 4409132 (1983-10-01), Forbus et al.
patent: 4420418 (1983-12-01), Chu

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