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.
为了解决这个问题，可以用无定形裂化组分对沸石进行改性而制成一种复合催化剂。
To overcome this problem, the zeolite can be modified with amorphous cracking component to form a compo - site catalyst.
评价表明含有这种改性沸石的催化剂显示了优越的降低汽油烯烃的效果，柴油产率可增加2.31%。
The catalyst containing P-RE-USY exhibits excellent performance of reducing naphtha olefins, increasing diesel yield more than 2.31%.
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