在水蒸气气氛中合成沸石分子筛及其特性

SYNTHESIS ZEOLITES IN WATER VAPOUR PHASE AND THEIR PROPERTIES

无定型硅铝凝胶－Ｎａ２Ｏ－Ａｌ２Ｏ３－ＳｉＯ２－Ｈ２Ｏ在水蒸气相中可以晶化合成出ＬＴＡ、ＦＡＵ和ＭＯＲ沸石晶体。本文重点研究了ＭＯＲ沸石的晶化条件和物理化学特性。它在间二甲苯异构化催化反应中催化活性为８４．６％，对二甲苯选择性为２２．０％。实验结果表明，蒸气相合成ＭＯＲ沸石时，以ＭＯＲ沸石作晶种，可以加速ＭＯＲ沸石生长，有利于提高沸石产率；而加入杂晶ＡＮＡ沸石和石英，不能阻止ＭＯＲ沸石的生成，为沸石双相共存晶化机理提供了一个证据。

Zeolites LTA,FAU,and MOR can be prepared from amorphous alminosili categel——Na 2 O Al 2 O 3 SiO 2 H 2 Oin water vapour phase method In this paper,crys tallineconditions and physicochemical properties of zeolite MOR are studied Its reactivityonm xylene isomerization is 84 6% and selectivityp of xylene is 22 0% in the experi ment Zeolite MOR as seed can accelate srystallization of zeolite MOR Zeolite ANA(or αquartz)as seed can not forbid forming zeolite MOR in gels The character of the process isthatzeolite MOR and zeolite ANA(or αquartz)crystallize simultaneously