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.
考察了催化剂焙烧温度、空速、碱含量、反应温度和不同阴、阳离子改性对催化剂活性和选择性的影响。
Effects of calcination temperature, space velocity, base content, reaction temperature, modification of various ions on the reactivity and selectivity of the catalysts were examined.
采用阴离子捕收剂油酸钠将矿石中的石英和方解石浮选分离以后，采用阳离子捕收剂醚胺浮选绿泥石时呈现出良好的选择性。
After the separation of quartz and calcite by flotation using anionic sodium oleate, cationic ether amine collector was used to float the chlorite, which exhibited a good selectivity.
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