Two stage process for improving the catalyst life of zeolites in

Details Two stage process for improving the catalyst life of zeolites in Two stage process for improving the catalyst life of zeolites in

1985-08-26

1987-01-20

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

585408, 585733, C07C 100

Patent

active

046381066

ABSTRACT:
A process for improving the catalyst life of zeolites employed in the conversion of alcohols (e.g. methanol) and/or their ether derivatives (e.g. dimethyl ether) wherein a suitable zeolite is modified in a 2-stage procedure by providing a controlled low amount of a coke precursor deposit on the external surface of the zeolite, and then heating this treated zeolite in an inert gas at specifically controlled temperatures for a minimum time is disclosed. A process of employing this modified zeolite to produce lower olefins is also disclosed.

REFERENCES:
patent: 4358395 (1982-11-01), Haag et al.
patent: 4477585 (1984-10-01), Kaeding

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