在用合成TS-2后的过滤液（简称母液）添加其它有机胺作模板剂合成钛硅沸石的研究中，发现添加四乙基氢氧化铵（TEAOH）溶液有促进TS-2沸石晶粒显著长大和骨架钛含量提高的作用；加乙二胺使合成的TS-2中混有少量的TS-1杂晶；加入正二丙胺合成的沸石已完全转晶为TS-1，而且其晶体形貌也有显著的改变．这种添加效应进而影响钛硅沸石作为苯酚羟基化的氧化催化剂和作为氧化苯乙烯重排反应的弱酸催化剂的催化性能．
Titanium-substituted silicate was synthesized by using tetrabutylammonium hydroxide (TBAOH), TS--2 mother liquor (ML), as well as ML and other organic amine as
templating agents respectively. In this system, TBA^+ cations serve as templating effects to direct the MEL structure, and then the templating agents of TBAOH, ML, or
ML+TEAOH (tetraethylammonium hydroxide) could all induce to produce TS--2 zeolites, but adding TEAOH into ML obviously enhanced the crystallinity and framework titanium
content of TS--2, and obtained a very large crystal; adding ethylenediamine (EDA) into ML could induce to produce a few of TS--1 crystal; adding n-Dipropylamine (DPA) into ML
completely induced to produce TS--1 zeolite. These zeolites were found to show a different activity in the hydroxylation of phenol with aqueous hydrogen peroxide
and the reaction of isomerizing styrene oxide to β-phenylaldehydes.
参考文献
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