沸石分子筛的生成机理与晶体生长(Ⅰ)—八面沸石导向剂结构的研究

THE MECHANISM OF FORMATION AND CRYSTAL GROWTH OF MOLECULAR-SIEVE-ZEOLITE(I)——THE STUDY ON THE STRUCTURE OF FAUJASITE TYPE"DIRECTING-AGENT

本文首次采用固体宽谱Na^(23)核磁共振法与电子衍射技术,研完了八面沸石导向剂胶体粒子的结构与性能,揭示了八面沸石导向剂的导向作用本质。

1.In this paper,the new and efficient broad line Na^(23)-NMR technique was first applied to investigate the existence and growth of nucleation center with faujasite type structure in a highly disperse colloidal system and some interesting results were obtained.This technique supported a possibility to study the nucleation processes of zeolite in a colloidal system.2.The nucleation processes of the so-called"directing-agent"(highly disperse colloidal system with a composition of 16Na_(2)O·Al_(2)O_(3)·15SiO_(2)-320H_(2)O)have been investigated by broad line Na^(23)-NMR,X-ray diffraction,electron diffraction technique.The structure of the colloidal particles in the"directing-agent"system has been verified to be of the faujasite type.It is the nuclei that enable NaY type zeolites to be formed in the starting mixture in which NaP type zeolites should be formed.