Process for the preparation of catalysts for use in ether synthe

Details Process for the preparation of catalysts for use in ether synthe Process for the preparation of catalysts for use in ether synthe

1985-01-10

1985-08-20

Dees, Carl F.

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

Zeolite or clay, including gallium analogs

Including organic component

502 77, 502 80, 502 79, 502 86, B01J 2908, B01J 2928, B01J 2116

Patent

active

045364850

ABSTRACT:
An aluminosilicate catalyst for catalytic dehydration of alcohols into ether is prepared by the steps of (a) contacting a crystalline aluminosilicate at below 800.degree. C., preferably 320.degree.-800.degree. C., with a nitrogen-containing base, preferably ammonia or a lower alkyl amine such as n-butyl amine, to absorb as much as possible of the base; and (b) desorbing part of the absorbed base by passing a stream of an inert gas over the thus-treated aluminosilicate at a temperature of 320.degree.-800.degree. C., preferably 400.degree.-600.degree. C. In step (a) the aluminosilicate catalyst is deactivated and in step (b) it is selectively reactivated so that the catalyst catalyses the ether formation reaction almost as well as the untreated catalyst, whereas the catalytic activity for other reactions such as formation of hydrocarbons and formation of "coke" consisting of polymerizates and/or carbon is eliminated. Suitable aluminosilicates to be treated according to the invention are zeolites, notably zeolite H-ZSM-5 and Y-zeolite, and smectites, notably cross-linked natural smectites.

REFERENCES:
patent: 3329730 (1967-07-01), Vives
patent: 3336240 (1967-08-01), Erickson et al.
patent: 3853743 (1974-12-01), Schwartz

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