Preparation of C.sub.2 -C.sub.4 -olefins from methanol/dimethyl

Details Preparation of C.sub.2 -C.sub.4 -olefins from methanol/dimethyl Preparation of C.sub.2 -C.sub.4 -olefins from methanol/dimethyl

1984-02-07

1985-03-05

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

585408, 585469, 585733, 502202, C07C 120

Patent

active

045032815

ABSTRACT:
C.sub.2 -C.sub.4 -olefins are prepared by catalytic conversion of methanol and/or dimethyl ether in the presence of a zeolite catalyst at elevated temperatures, by a process in which the catalyst used is a pure borosilicate zeolite which has been tableted or extruded without a binder and treated with hydrofluoric acid and hydrochloric acid. The treatment of the catalyst with hydrofluoric acid is carried out using 0.001-1N HF, and that with hydrochloric acid is carried out using 3-25% strength acid. The time-on-stream of the catalyst is improved.

REFERENCES:
patent: 4254297 (1981-03-01), Frenken et al.
patent: 4292458 (1981-09-01), Klotz
patent: 4423273 (1983-12-01), Hoelderich et al.
patent: 4433188 (1984-02-01), Hoelderich et al.

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