研究了以阳离子改性的丝光沸石为催化剂，以氨和甲醇为原料，在常压固定床上二甲胺选择性合成反应。
The select(?)ve synthesis of dimethylamine from ammonia and methylalcohol using the cation modified mordenite as catalysts on atmospheric pressure fixed bed have been studied.
当采用固定床连续甲酯化反应时，适宜的催化剂为强酸性阳离子交换树脂。
When the fixed bed continuous process is used, the appropriate catalyst is strong acid cation exchange resin.
该微球经化学改性后得到一种亲水性良好的新型高效弱阳离子交换色谱固定相。
Based on this media, a new hydrophilic weak cation exchange stationary phase(WCX) for high(performance) liquid chromatography was synthesized by a new chemical modification method.
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