| 酸处理红辉沸石-氢氧化钠-铝酸钠-水的水热反应体系A型沸石的形成机理 |
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| 引用本文： | 申少华,方克明,张术根,王大伟.酸处理红辉沸石-氢氧化钠-铝酸钠-水的水热反应体系A型沸石的形成机理[J].北京科技大学学报,2003,25(6):489-494. |
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| 作者姓名： | 申少华 方克明 张术根 王大伟 |
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| 作者单位： | 1. 北京科技大学,北京,100083
2. 中南大学,长沙,410083 |
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| 摘 要： | 以酸处理红辉沸石为原料，采用水热反应晶化合成工艺，合成出了质量较高的4A沸石产品。在大量实验基础上，利用X射线衍射分析、扫描电镜观察等系统地研究了反应过程。在整个反应过程中，酸处理红辉沸石和铝酸钠不断溶解，固相的SiO2和Al2O3不断转化为液相的SiO2和Al2O3。这表明，A型沸石的形成是以液相各组分浓度的过饱和为动力，以液相为传质的，因此为液相转化机理。
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| 关 键 词： | 酸处理红辉沸石 氢氧化钠 铝酸钠 水热反应体系 A型沸石 形成机理 液相转化机理 沸石分子筛 |
| 修稿时间： | 2002年9月4日 |
Formation Mechanism of Zeolite A in the Hydrothermal Reaction System of Acid treated Stellerite-NaOH-NaAlO2-H2O |
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| SHEN Shaohua,FANG Keming,ZHANG Shugen,WANG Dawei
University of Science and Technology Beijing,Beijing ,China , Central South University,Changsha ,China.Formation Mechanism of Zeolite A in the Hydrothermal Reaction System of Acid treated Stellerite-NaOH-NaAlO2-H2O[J].Journal of University of Science and Technology Beijing,2003,25(6):489-494. |
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| Authors: | SHEN Shaohua FANG Keming ZHANG Shugen WANG Dawei
University of Science and Technology Beijing Beijing China Central South University Changsha China |
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| Institution: | SHEN Shaohua,FANG Keming,ZHANG Shugen,WANG Dawei
University of Science and Technology Beijing,Beijing 100083,China , Central South University,Changsha 410083,China |
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| Abstract: | Zeolite A was synthesized by hydrothermal crystallization using the acid-treated stellerite as raw material. The synthesizing process was examined by XRD and SEM. In this reaction process, the SiO2 and Al2O3 in solid phase were translated into the SiO2 and Al2O3 in the liquid phase continuously, when the acid-treated stellerite and NaAlO2 were dissolved. These phenomena indicate that the formation mechanism of zeolite A is the solution-mediated transport mechanism, because the formation of zeolite A is drived by the concentration supersaturation of the composition in liquid phase, and is transported by solution-media. |
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| Keywords: | acid-treated stellerite hydrothermal system zeolite A formation mechanism solution-mediated transport mechanism |
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