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
收藏
页码：1237 / 1242
页数：6
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