一种高纯度大孔硅胶的制备工艺

化工进展

一种高纯度大孔硅胶的制备工艺

张翠玲，张鹏，刘文霞，李丽，刘强

中国石油兰州化工研究中心，甘肃兰州 730060

出版日期:2011-06-05 发布日期:2011-06-05

Preparation process of a high purity macroporous silica gel

ZHANG Cuiling，ZHANG Peng，LIU Wenxia，LI Li，LIU Qiang

Lanzhou Petrochemical Research Center，PetroChina，Lanzhou 730060，Gansu，China

Online:2011-06-05 Published:2011-06-05

摘要/Abstract

摘要：

以硅酸盐、无机酸为原料，经凝胶、老化、酸化、水洗、除杂、干燥工序后得到高纯度大孔硅胶，用比表面空隙仪对样品的物性参数进行了分析，用X-荧光分析仪对样品中的SiO₂和杂质含量进行了测定。结果表明，将所选用的除杂剂加入常规工艺制得的硅胶滤饼中，在水浴温度为60 ℃、搅拌时间为1 h的条件下，可以得到孔容为1.5～2.0 mL/g、孔径为18～25 nm、比表面积为260～350 m²/g、纯度为99.5%以上的高纯度大孔硅胶。

Abstract:

A high purity macroporous silica gel was prepared with mineral acid and silicate as raw materials by gelling，aging，acidification，washing，purification and dehydration. The surface area，pore volume and pore diameter of samples were characterized by BET，the content of SiO₂ and impurities were measured by X-luminoscope. The results showed that high purity macroporous silica gel with a content of SiO₂ more than 99.5%，pore volume 1.5—2.0 mL/g，pore diameter 18～25 nm and specific surface area 260—350 m²/g could be prepared by adding impurities removal agent in silica gel filter cake prepared by conventional process at water bath temperature 60 ℃ and by stirring for an hour.

张翠玲，张鹏，刘文霞，李丽，刘强. 一种高纯度大孔硅胶的制备工艺 [J]. 化工进展.

ZHANG Cuiling，ZHANG Peng，LIU Wenxia，LI Li，LIU Qiang. Preparation process of a high purity macroporous silica gel[J]. Chemical Industry and Engineering Progree.