Synthesis of crystalline γ-Al2O3 with high purity

被引：0
|
作者：
仪建红 [1 ]
孙友谊 [1 ]
高建峰 [2 ]
徐春彦 [2 ]
机构：
[1] College of Materials Science and Engineering,North University of China
[2] Department of Chemistry,North University of China
来源：
TransactionsofNonferrousMetalsSocietyofChina | 2009年 / 19卷 / 05期
关键词：
γ-Al2O3; high purity; sodium aluminate; oxalic acids;
D O I：
暂无
中图分类号：
TB383.3 [];
学科分类号：
摘要：
Crystallineγ-AlO(OH)was synthesized by the precipitation of sodium aluminate and oxalic acids in aqueous solution. And thenγ-AlO(OH)was successfully transferred toγ-Al2O3 after subsequent high temperature heat treatment.The effects of reaction conditions on formation ofγ-AlO(OH)andγ-Al2O3 were further investigated in detail.The XRD analysis shows that the complete formation of crystallineγ-Al2O3 is at pH 8-9,reaction temperature of 93-96℃and calcination temperature of higher than 400℃.The product ofγ-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 m2/g and 0.57 mL/g,which can be applied in catalysts and catalyst supports.
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页码：1237 / 1242
页数：6
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