Synthesis of crystalline γ-Al2O3 with high purity

被引：44

作者：

Yi Jian-hong ^{[2
]}

Sun You-yi ^{[2
]}

Gao Jian-feng ^{[1
]}

Xu Chun-yan ^{[1
]}

机构：

[1] N Univ China, Dept Chem, Taiyuan 030051, Peoples R China

[2] N Univ China, Coll Mat Sci & Engn, Taiyuan 030051, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2009年 / 19卷 / 05期

关键词：

gamma-Al2O3; high purity; sodium aluminate; oxalic acids; ALUMINA POWDER; CATALYST; DESILICONIZATION; NANOCRYSTALS;

D O I：

10.1016/S1003-6326(08)60435-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Crystalline gamma-AlO(OH) was synthesized by the precipitation of sodium aluminate and oxalic acids in aqueous solution. And then gamma-AlO(OH) was successfully transferred to gamma-Al2O3 after subsequent high temperature heat treatment. The effects of reaction conditions on formation of gamma-AlO(OH) and gamma-Al2O3 were further investigated in detail. The XRD analysis shows that the complete formation of crystalline gamma-Al2O3 is at pH 8-9, reaction temperature of 93-96 degrees C and calcination temperature of higher than 400 degrees C. The product of gamma-Al2O3 contains impurity, including iron, calcium and silicon ion with a low content of about 0.01% and has large specific surface area and high pore volume of 269.9 m(2)/g and 0.57 mL/g, which can be applied in catalysts and catalyst supports.

引用

页码：1237 / 1242

页数：6

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