精制磷酸脱砷技术研究

Study on Dearsenification Technology of Refined Phosphoric Acid

研究了以硫化钠作为脱砷剂脱除工业磷酸中砷的脱砷方法。重点分析了硫化钠加入量、反应温度、反应时间和陈化时间对工业磷酸脱砷效果的影响。结果表明:以硫化钠作为脱砷剂能有效脱除磷酸中的砷,脱砷率可达95.7%以上。

The removal of arsenic from industrial phosphoric acid by sodium sulfide was studied.The effects of sodium sulfide addition,reaction temperature,reaction time and aging time on the removal of arsenic by industrial phosphoric acid were emphatically analyzed.The experimental results showed that sodium sulfide could effectively remove arsenic from phosphoric acid,and the removal rate of arsenic was more than 95.7%.