PREPARATION AND PROPERTIES OF FINE HEMATITE POWDERS BY HYDROLYSIS OF IRON CARBOXYLATE SOLUTIONS

被引：18

作者：

KONISHI, Y

KAWAMURA, T

ASAI, S

机构：

[1] Department of Chemical Engineering, University of Osaka Prefecture, Osaka

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 1994年 / 25卷 / 02期

关键词：

D O I：

10.1007/BF02665199

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Submicrometer, crystalline hematite (alpha-Fe2O3) particles were prepared by hydrolysis of organic iron carboxylate solutions using water at 175-degrees-C for 30 minutes. The particle size of hematite was significantly dependent on the liquid-phase stirring speed and the organic compositions. The precipitation rate of hematite from the organic solution followed first-order kinetics. The precipitation rate increased markedly with increasing temperature, and the activation energy for the process was 94.6 kJ mol-1. At 220-degrees-C, the hydrolysis of iron carboxylate solution led to a mixture of hematite and magnetite (Fe3O4). The iron oxides prepared at 175-degrees-C to 220-degrees-C were found to be free from organic contamination by the starting material.

引用

页码：165 / 170

页数：6

共 10 条

[1] THE PHYSICAL-CHEMISTRY OF THE PRECIPITATION STRIPPING PROCESS FOR REMOVING IRON(III) FROM CARBOXYLATE SOLUTIONS WITH DILUTE SULFURIC-ACID [J].