Process for producing light olefins

Details Process for producing light olefins Process for producing light olefins

1998-04-06

2000-04-04

Tran, Hien

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

From nonhydrocarbon feed

585639, C07C 100

Patent

active

060463724

ABSTRACT:
There is provided a process for converting methanol and/or dimethyl ether to a product containing C.sub.2 to C.sub.4 olefins which comprises the step of contacting a feed which contains methanol and/or dimethyl ether with a catalyst comprising a porous crystalline material, said contacting step being conducted in the presence of an aromatic compound under conversion conditions including a temperature of 350.degree. C. to 480.degree. C. and a methanol partial pressure in excess of 10 psia (70 kPa), said porous crystalline material having a pore size greater than the critical diameter of the aromatic compound and the aromatic compound being capable of alkylation by the methanol and/or dimethyl ether under said conversion conditions.

REFERENCES:
patent: 4025575 (1977-05-01), Chang et al.
patent: 4079095 (1978-03-01), Givens et al.
patent: 4499314 (1985-02-01), Seddon et al.
patent: 4677242 (1987-06-01), Kaiser
patent: 4752651 (1988-06-01), Kaiser
patent: 5278345 (1994-01-01), Janssen et al.

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