高铁钾长石粉体合成13X型分子筛的晶化过程  

Mechanism of 13X Zeolite Crystallization with Fe_2O_3-Rich Potassium Feldspar Powder as Raw Materials:An Experimental Study

作　　者：章西焕[1,2] 马鸿文[1] 

机构地区：[1]中国地质大学矿物材料国家专业实验室,北京100083 [2]中国地质博物馆,北京100034

出　　处：《矿物学报》2013年第1期31-37,共7页Acta Mineralogica Sinica

基　　金：教育部博士学科点基金项目(资助号:1999049114);"十一五"国家科技支撑计划课题(资助号:2006BAD10B04)

摘　　要：利用高铁钾长石粉体水热合成13X型分子筛,对晶化过程进行表征,确定了晶化过程的诱导期、晶化期和沸石生长速率。结果显示,与低铁合成体系对比,高铁合成体系中反应物料的陈化期及晶化早期反应产物的红外结构、化学组成更接近于13X型分子筛的红外结构和化学组成,即反应物更易于向13X型分子筛结构转变;13X型分子筛开始形成的时间更早,晶化过程的诱导期和晶化期时间缩短。与低铁合成体系一样,高铁体系水热合成13X型分子筛,晶体成核与生长主要发生在凝胶相内部,是凝胶结构逐步趋于有序化的过程。The synthesis of 13X zeolite with FezO3-rich potassium feldspar powder as the raw material is characterized by XRD, SEM, IR, and chemical analysis. The investigation discovers the inducement period, crystallization process and the average growth speed of 13X zeolite grains. Comparing with the synthesis of 13X zeolite with Fe2Os-poor potassium feldspar powder as the raw material, the infrared structure of the reaction mixture and chemical compositions at the inducement and initial crystalization are closer to 13X zeolite＇s, indicating that the reaction mixture easily changes into the zeolite, and the inducement and crystalization time is short. Same as the synthesis of 13X zeolite with Fe203-poor potassium feldspar powder as the raw material, the growth of 13X zeolite is mainly in the aluminosilicate gels, in the process of aluminosilicate gels structure being in order while the liquid participates the formation of 13X zeolite.

关 键 词：高铁钾长石粉体 13X型分子筛 水热合成 晶化过程 

分 类 号：P575[天文地球—矿物学] P579[天文地球—地质学]