| 摘要 |
There is provided a process for converting methanol and/or dimethyl ether to a product containing C2-C4 olefins which comprises the step of contacting a feed which contains methanol and/or dimethyl ether with a catalyst comprising a porous crystalline material, the contacting step being conducted in the presence of a co-fed aromatic compound under conversion conditions including a temperature of 350 to 480 °C and a methanol partial pressure in excess of 10 psia (70 kPa), the 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 the conversion conditions. |
