盐酸浸出氧化锑泥制备SbCl_3

Preparation of Antimony Trichloride by Leaching Antimony Oxide Sludge with Hydrochloride Acid

利用HSC6.0软件分别绘制不同温度、氯离子浓度下的Sb-Cl-H_2O的E-pH图,结果表明:在Sb-Cl-H2O体系中,溶液温度、酸度和氯离子浓度是SbCl_3稳定存在的主要因素。用盐酸浸出氧化锑泥,实验结果表明:当盐酸加入量(盐酸体积/氧化锑泥质量L/S)为3,常温下浸出4 h,氧化锑泥的浸出率可达94%以上。浸出渣的XRD分析表明:浸出渣主要是NaCl,随着盐酸量增加,渣中锑含量逐渐降低。

E-pH Diagrams of Sb-Cl-H2O were obtained on the basis of different reaction temperature and concentration of Chlorine ion, respectively, by HSC6.0 softare. It is found that temperature, acidity and chlorine concentration have major influence on existence of SbCh in Sb-Cl-H2O system. The experiment that leaching antimony oxide sludge with hydrochloride acid shows that leaching rate of sludge could be more than 94 % while the ratio of volume of hydrochloride acid and mass of sludge （L/S） was 3 and reaction time was 4 hours at normal temperature. The analysis result of leaching residual by X-ray diffraction means that most of residual might be sodium chloride, and the quantity of antimony in residual decreases gradually with acidity increased