【摘要】 研究了空气氧化法生产焦锑酸钠的氧化后液中脱除砷和锑的方法,并探讨了提高副产品硫代硫酸钠产量的途径。研究结果表明:采用硫酸和SO2中和脱除砷和锑,终点pH值分别控制在6.0和7.0,砷的脱除率分别为26.9%和19.3%,锑的脱除率分别为94.5%和93.5%;而采用硫酸亚铁、水合肼和硫化钠3种试剂脱除砷和锑,过量系数分别为1.0,2.0和1.0时砷的脱除率分别为70.0%,50.0%和60.0%,锑的脱除率分别为96.7%,95.6%和96.7%;在加硫磺反应中,当过量系数为1.1和时间为90min时,硫向硫代硫酸钠的转化率能达到83.3%。更多还原

【Abstract】 The removal of arsenic and antimony from the oxidated solution was investigated in the sodium thioantimonite production by air oxidation, and the approach of enhancing the by-product output of sodium thiosulfate was explored. The results show that when sulphuric acid and SO₂ gas are separately used to neutralize the oxidation solution, as the ending pH is controlled at （6.0） and 7.0, respectively,the removal ratio of arsenic is 26.9% and 19.3%; the removal ratio of antimony is 94.5% and 93.5%, respectively. When FeSO₄, N₂H₄ and Na₂S with the excessive coefficient of 1.0,2.0,1.0 respectively are used to remove arsenic and antimony, the removal ratio of arsenic are 70.0%,50.0% and 60.0%, separately; the removal of antimony can reach 96.7%, 95.6% and 96.7%, respectively. The transform ratio of sulfur can reach 83.3% when the sulphuric excessive coefficient is 1.1 and the time is 90 min.更多还原