High temperature reaction of kaolin with inorganic acids

被引：20

作者：

Colina, FG ^{[1
]}

Esplugas, S ^{[1
]}

Costa, J ^{[1
]}

机构：

[1] Univ Barcelona, Dept Chem & Met Engn, E-08028 Barcelona, Spain

来源：

BRITISH CERAMIC TRANSACTIONS | 2001年 / 100卷 / 05期

关键词：

D O I：

10.1179/096797801681468

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A new method is described in which raw materials prepared by mixing kaolin and concentrated acid are heated in a furnace at temperatures between 100 and 700degreesC. Experiments with HCl, HNO3, H3PO4, and H2SO4 showed that only, H2SO4 gave high reaction yields, which grew steadily as reaction temperature was raised. Reaction products were mostly Al-2(SO4)(3). Leached kaolin samples showed BET specific surface areas of over 100 m(2) g(-1). Furthermore, reaction between kaolin and H2SO4 required no previous calcination of kaolin.

引用

页码：203 / 206

页数：4

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