摘要
比较了Ｂ、Ｌａ、Ｐ、Ｐ－Ｍｇ元素改性的［Ｂ］杂原子沸石催化剂，硅烷化的［Ｂ］杂原子沸石催化剂，改性前、后高温水汽处理的［Ｂ］杂原子沸石催化剂，以及经几种方法综合制备的［Ｂ］杂原子沸石催化剂对甲苯／乙烯烷基化反应的影响。通过对［Ｂ］杂原子沸石催化剂的改质，使催化剂的活性、对位产物选择性、以及稳定性都达到了满意的效果。其中以Ｂ改性效果最好，在活性２２．９２％时，对－乙基甲苯选择性达９６．８０％，而且稳定性也好。水汽处理是提高催化剂稳定性的好方法。硅烷化处理后，提高了烷基化反应产物的对位选择性。
The zeolite catalysts of mingled atom modified by B,La,P,P-Mg, one modified by chemical surface deposition of silicon, one treated in water-vapour at high temperature and treated by comprehensive all the above mentioned methods used to effect of the alkylation of toluene with ethytene are compared. The modified zeolite catalysts have satisfactory alkylation activity, selectivity and stability. The zeolite catalysts modified by B is the best in all methods, the selectivity of p -ethyltoluene reached 96.80 % at the activity 22.92 % and the stability was good. The water-vapour treatment is a good method to increase the activity stability of catalysts. The zeolite catalysts modified by chemical surface deposition of silicon improved the alkylation p -product selectivity.
出处
《抚顺石油学院学报》
1998年第3期1-6,12,共7页
Journal of Fushun Petroleum Institute
基金
国家自然科学基金
关键词
催化剂
杂原子沸石
烷基化
改性
Catalyst
ZSM-5
Zeolite of mingled atom
Alkylation
Modify
Treat in water-vapour
Siliconiting
