摘要
采用水热KOH溶液法对低硅ZSM-5分子筛(Si/Al_2=40)或丝光沸石(Si/Al_2=15)进行骨架补铝。从补铝前后样品^(20)Si和^(27)Al魔角自旋核磁共振谱的分析,证明了补铝后样品骨架硅铝比降低10%以上。使用补铝后的ZSM-5分子筛或丝光沸石,异丙苯的裂化和甲苯的歧化反应活性提高30%。
The alumination of the lowly siliceous zeolites, i. e. ZSM-5 (Si/Al_2=40) andmordenite (Si/Al_2=15), have been carried out by using a simple hydrothermaltreatment in a KOH solution at moderate temperature. ~29Si-MAS-NMR and ^(27)Al-MAS-NMR spectra show that the framework Al content has been increased and thecatalytic activity of the modified zeolites has been increased obviously for cumenecracking and toluene disproportionation.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
1990年第3期273-278,共6页
Journal of Fudan University：Natural Science
基金
国家自然科学基金
关键词
沸石
分子筛
补铝
异丙苯
裂化
cumene, cracking, toluene, disproportionation
ZSM-5 zeolite, mordenite, alumination.
