合成方法对Ti-SiZSM-5分子筛合成影响及合成过程探讨

在廉价原料水热合成体系中研究了合成原料组成、陈化、超声波振荡处理、加入导向剂或晶种对合成Ｔｉ－ＳｉＺＳＭ－５分子筛的影响，结果表明：在较低碱度下、ｎ（ＳｉＯ２）／ｎ（ＴｉＯ）很宽匀易生成Ｔｉ－ＳｉＺＳＭ－４８；在较高碱度下、ｎ（ＳｉＯ２）／ｎ（ＴｉＯ２）在５０－４００时易生成Ｔｉ－ＳｉＺＳＭ－５。凝胶必须陈化处理才能合成出高结晶度的Ｔｉ－ＳｉＺＳＭ－５分子筛，但凝胶经超声波振荡后合成钛硅分子筛时，

Influence of synthetic method on synthesis of Ti-SiZSM-5 zeolite and exploration of synthesis procedure

The influence of synthesis method on the synthesis of Ti SiZSM 5 zeolite and the mechanism of synthesis are studied in detail. The synthesis process of Ti SiZSM 5 zeolite using much cheaper raw materials such as silica sol, Ti(H 2O 2) 2+ ],TEAOH and HDA depends strongly on n (SiO 2)/ n (TiO 2), n (Na 2O)/ n (SiO 2), n (TEAOH +HDA)/ n (SiO 2). It has been found that Ti SiZSM 5 can only be obtained at high n (SiO 2)/ n (TiO 2), low n (Na 2O)/ n (SiO 2) in the synthesis hydrogel and the chemical composition of the synthesis hydrogel may be changed in a small range. Seed, structure directing agent added and the ripening of hydrogel during the synthesis of Ti SiZSM 5 zeolite are beneficial to the improvement of crystallinity and the incorporation of Ti into the framework of Ti SiZSM 5 .