Preparation of olefins from methanol and/or dimethyl ether

Details Preparation of olefins from methanol and/or dimethyl ether Preparation of olefins from methanol and/or dimethyl ether

1982-09-01

1984-02-21

Gantz, Delbert E.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

585312, 585315, 585357, 585408, 585469, 585638, 585733, C07C 120

Patent

active

044331886

ABSTRACT:
A process for the preparation of lower olefins from methanol or dimethyl ether by catalytic conversion at from 300.degree. to 550.degree. C. in two stages over borosilicate zeolites, wherein C.sub.2 -C.sub.4 -olefins and C.sub.1 -C.sub.4 -paraffins are removed after the first reaction stage, the C.sub.5.sup.+ hydrocarbons are passed to the second reaction stage, the aromatics are removed from the reaction product of the second stage and the remaining reaction products are recycled. The advantage of this process is an improvement in the yield of olefins.

REFERENCES:
patent: 4025576 (1977-05-01), Chang et al.
patent: 4052472 (1977-10-01), Givens et al.
patent: 4058576 (1977-11-01), Chang et al.
patent: 4292458 (1981-09-01), Klotz

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