摘要
用核磁共振技术、紫外吸收光谱和硅钼酸反应等方法研究了反应体系中硅酸根离子和铝酸根离子的聚合态。发现反应产物的形态与硅酸根的聚合态有关，单态铝酸根离子与高聚硅酸根离子（聚合度＞４０）反应生成凝胶；单态铝酸根离子与单态或二聚态硅酸根离子反应生成沉淀。本文还研究了相同条件下的水热晶化行为，在沉淀区、混合区、凝胶区和溶胶区分别晶化得到沸石Ａ、Ｘ、Ｙ和Ｐ。
The polymeric state of silicate anions and aluminate anions were studied by means of￣(27)Al NMR, UV-Vis spectra and silicate molybate method. It was found that the state of reaction products is affected by the polymeric state of silicate anions. The reaction between mono-aluminate anions and polymeric silicate anions(polymeric degree> 40)results in the formation of a gel,but during the reaction of mono-aluminate anions with mono- or di-silicate anions a precipitate was formed. The hydrothermal crystallization behaviour was also studied under the same conditions. Zeolites A, X, Y and P were crystallized in the area of precipitate, mixture, gel and sol respectively.
出处
《高等学校化学学报》
CSCD
北大核心
1995年第10期1491-1494,共4页
Chemical Journal of Chinese Universities
基金
国家教育委员会博士点基金
