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用离子交换法分离P ,Si,As,Mo制取高纯APT ,需要用硫化剂Na2 S或NaHS等从钨酸钠溶液中使钼酸盐转化为硫代钼酸盐 ,用离子交换法吸附硫代钼酸根从而实现钨钼分离 .这些硫化剂价格较高 ,使除钼成本增大 .因而 ,研究一种高效、价格低廉的新型硫化剂非常重要 .作者研究了一种比RCS廉价的新型硫化剂R1CS代替RCS ,NaHS ,Na2 S和H2 S ,考察了新型硫化剂R1CS在粗钨酸钠溶液中生成硫代钼酸钠的硫代化效果 .结果表明 ,对含WO312 0 .2 5 6g/L ,Mo 1.4 5 7g/L的实际钨酸钠溶液 ,控制R1CS的加入量为Mo的近 10倍 ,在装有回流管的三颈瓶中于10 6℃搅拌反应 2 .5h ,反应冷至室温后 ,用 1∶1(体积比 )的盐酸在密闭的容器中调节酸度至pH值为 8.0～ 8.4 ,在 70℃磁力搅拌再反应 2h ,用 3 %N2 6 3单级萃取检查硫代化效果 ,钼的萃取率可达 96%以上 ,表明运用这种新型硫化剂在Na2 WO4溶液中制备硫代钼酸盐时成本低 ,效率高
Separation of P, Si, As and Mo by ion exchange method to prepare high purity APT requires the conversion of molybdate to thiomolybdate from sodium tungstate solution with a sulfidizing agent such as Na 2 S or NaHS and is adsorbed by ion exchange Thiomolybdate in order to achieve the separation of tungsten and molybdenum.The higher the price of these curatives, the cost of removing molybdenum increases.Therefore, it is very important to study a new type of curative with high efficiency and low cost.The author has studied a new type of cheaper than RCS The curing agent R1CS was substituted for RCS, NaHS, Na2S and H2S to investigate the thiolation effect of the novel sulfidation reagent R1CS in the sodium tungstate solution, / L, Mo 1.4 5 7g / L of the actual sodium tungstate solution, the amount of control R1CS added Mo nearly 10 times in a three-necked flask equipped with a reflux tube at 106 ℃ stirred reaction 2.5 h, cold reaction After the temperature was raised to room temperature, the acidity was adjusted to pH 8.0-8.4 with a 1: 1 (by volume) hydrochloric acid in a closed container, the reaction was further stirred for 2h under magnetic stirring at 70 ° C, and the thio was checked by 3% N2 6 3 single stage extraction The effect of molybdenum extraction rate of up to 96%, indicating that the use of this new curing agent in Na2 WO4 solution of thiomolybdate into This low, high efficiency