| 摘要 |
1496181 Dimethyl ether MOBIL OIL CORP 11 Sept 1975 [23 Sept 1974 (3) 6 Jan 1975 28 March 1975 19 Aug 1975] 37415/75 Heading C2C [Also in Divisions B1 C1 and C5] In Examples (163, 164) dimethyl ether is produced by the dehydration of methanol at 300- 500‹ C. in the presence of catalysts made by modifying zeolite ZSM-5 by reaction with trimethyl phosphite followed by heating to incorporate phosphorus in the zeolite. |
