| 摘要 |
<p>PCT No. PCT/BE96/00072 Sec. 371 Date Jan. 6, 1998 Sec. 102(e) Date Jan. 6, 1998 PCT Filed Jul. 5, 1996 PCT Pub. No. WO97/02891 PCT Pub. Date Jan. 30, 1997Process for the preparation of a modified ammonium mordenite, characterized in that it comprises the steps of (1) drying an ammonium mordenite under conditions such that the mordenite is maintained in ammonium form and (2) treating the dried ammonium mordenite thus obtained with tetrachlorosilane in the gas phase at a temperature of between 300 and 600 DEG C. The modified ammonium mordenite obtained by this process is suitable for use as a catalyst in the production of methylamines by reaction of ammonia and methanol, allowing high selectivities in dimethylamine.</p> |
