Patent ID: 7393990

Claim:
A method for converting methanol and/or dimethyl ether to a product containing C 2 and C 3 olefins which comprises contacting a feed which contains methanol and/or dimethyl ether with a catalyst comprising a gallium-modified ZSM-5 porous crystalline material, said contacting step being conducted in the presence of an aromatic compound under conversion conditions including a temperature of 350° C. to 450° C. and a methanol and/or dimethyl ether partial pressure in excess of 6.9 kPa, and the aromatic compound being capable of alkylation by the methanol and/or dimethyl ether under said conversion conditions wherein said catalyst comprises zeolite-bound zeolite having at least one component selected from the group consisting of bound Ga-modified zeolite having a Si/Ga molar ratio ranging from 5 to 500 and a binder of Ga-modified zeolite having a Si/Ga molar ratio ranging from 5 to ∞.