由膨润土合成4A分子筛

由膨润土合成4A分子筛

伊莉¹, 马红超¹, 付颖寰¹, 朱万春², 王振旅², 薛文平¹, 董晓丽¹

1. 大连工业大学化工与材料学院, 辽宁大连 116034; 2. 吉林大学化学学院, 长春 130021

收稿日期:2008-07-29 修回日期:1900-01-01 出版日期:2009-05-26 发布日期:2009-06-23

Synthesis of 4A Zeolite from Bentonite

YI Li¹, MA Hongchao¹, FU Yinghuan¹, ZHU Wanchun², WANG Zhen lv²,XUE Wenping¹, DONG Xiaoli¹

1. School of Chemistry Engineering & Material, Dalian Polytechnic University, Dalian 116034, Liaoning Province, China;2. College of Chemistry, Jilin University, Changchun 130021, China

Received:2008-07-29 Revised:1900-01-01 Online:2009-05-26 Published:2009-06-23

摘要/Abstract

摘要： 以天然膨润土为原料, 采用一步碱溶水热法合成4A分子筛. 探讨了不同的n_Na₂O∶n_SiO₂, n_H₂O∶n_{Na_₂O, n_SiO₂∶n_Al₂O₃
及合成时间与温度等工艺条件对4A分子筛结构与性能的影响. 结果表明, 当反应物料组成为n_Na₂O∶n_SiO₂=2, n_H₂O∶n_{Na_₂O=60和n_SiO₂∶n_Al₂O₃=1.5时, 于90 ℃反应6 h可以得到质量较好的4A分子筛, 其产品晶形规整, 晶粒粒径大多数小于2 μm, 钙离子
(CaCO₃)交换容量可达293 mg/g.}}

关键词: 膨润土, 一步碱溶, 4A分子筛, 影响因素

Abstract: Zealite 4A was synthesized by a onestep alkalidissolved hydrothermal method with bentonite as raw material. The effects of n_Na₂O∶n_SiO₂, n_H₂O∶n_{Na_₂O, n_SiO₂∶n_Al₂O₃,
synthesis time and temperature on
the properties of the products were investigated by means of XRD, SEM and calciu
m ion exchange capacity. The optimum conditions for synthesizing zeolite 4A are
n_Na₂O∶n_SiO₂=2, n_H₂O∶n_{Na_₂O=60和n_SiO₂∶n_Al₂O₃=1.5,
a crystallization temperature of 90 ℃ and a reaction time of 6 h. Under
the optimal conditions, zeolite 4A with a high degree of crystallinity, a small
granularity of particles (most of the particle size of zeolite 4A was less than
2 μm) and a high calcium ion(CaCO₃)exchange capacity (293 mg/g) was obtained.}}

Key words: bentonite, onestep alkali dissolve, zeolite 4A, influence factor

中图分类号:

O743.4

伊莉, 马红超, 付颖寰, 朱万春, 王振旅, 薛文平, 董晓丽. 由膨润土合成4A分子筛[J]. J4, 2009, 47(03): 600-604.

YI Li, MA Hongchao, FU Yinghuan, ZHU Wanchun, WANG Zhen lv,XUE Wenping, DONG Xiaoli. Synthesis of 4A Zeolite from Bentonite[J]. J4, 2009, 47(03): 600-604.

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