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Seed-assisted synthesis of TS-1 crystals containing Al with high catalytic performances in cyclohexanone ammoximation
Yan Xue1, Guangling Zuo1, Yiqiang Wen2
1Biological and Chemical Engineering College, Nanyang Institute of Technology 80 Changjiang Road Nanyang 473004 China yanxue800@163.com.
Abstract:
In this study, titanium silicalite (TS-1) crystals containing Al were synthesized using aluminosilicate MFI zeolites as seeds in a tetrapropylammonium bromide (TPAB)-ethanolamine (EA) system. The TS-1 containing Al possessed large size, large L value and higher catalytic activity in cyclohexanone ammoximation. Larger L value would endow the TS-1 crystals with better mechanical strength and erosion resistance. The introduction of an Al atom into the TS-1 crystals resulted in the production of more acid sites and a bit strong Brönsted acid sites; these acid sites were more favorable to the catalytic performances in cyclohexanone ammoximation.
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