无机材料学报

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添加有机胺对钛硅沸石的合成和催化性能的影响

伏再辉; 尹笃林; 张鲁西+; 张友玉+; 万言+   

  1. 湖南师范大学精细催化合成研究所; 长沙410081; +湖南师范大学实验中心 长沙 410081
  • 收稿日期:1997-07-14 修回日期:1997-09-01 出版日期:1998-08-10 网络出版日期:1998-08-10

Effects of Adding Organic Amine on the Synthesis of TS Zeolitesand Catalytic Properties

FU Zai--Hui; YIN Du-Lina; ZHANG Lu-Xi+; ZHANG You-Yu+; WAN Yan+   

  1. Institute of Fine Catalysis & Sgnthesis; Hadal Normal University Changsha 410081 China; +Centre of Experiment; Hadal Normal University Changsha 410081 China
  • Received:1997-07-14 Revised:1997-09-01 Published:1998-08-10 Online:1998-08-10

摘要: 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.

关键词: 钛硅沸石, 合成, TS-2母液, 有机胺, 苯酚羟基化, 氧化苯乙烯重排

Abstract: 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.

Key words: TS zeolites, synthesis, mother liquor, organic amine, templating effects, phenol hydroxylation

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