Patent ID: 6613951
Filing Date: 2003-09-02
Classification: C07C,Y02P

Abstract:
A process for converting methanol or dimethyl ether to a product containing C2 olefin, the process comprising the step of contacting a feed containing methanol or dimethyl ether and an aromatic compound which has a critical diameter less than the pore size of the zeolite catalyst and which is capable of alkylation by the methanol and/or dimethyl ether with a catalyst which comprises a zeolite having 10-ring intersecting channels and which has a Diffusion Parameter for 2,2-dimethylbutane of less than 100 secâˆ’1 when measured at a temperature of 120Â° C. and a 2,2-dimethylbutane pressure of 60 torr, the contacting step being conducted at a temperature of 370 to 480Â° C., a methanol or dimethyl partial pressure of 30 to 150 psia to provide C2 olefin.