Na_2WO_4溶液中砷的萃取色谱分离研究

Study on Extraction Chromatography Separation

报道了ＣＬＮ１９２３萃淋树脂的制备方法及其在弱碱性条件下对钨和砷的吸萃性能，并研究了从高含量钨溶液中分离微量砷的条件。静态法及动态法试验结果表明，ＣＬＮ１９２３萃淋树脂能够有效地分离粗Ｎａ２ＷＯ４溶液中的砷，砷含量可由Ａｓ／ＷＯ３＝０．０４％～００８％降至０００３％～０００６％。

A synthetic method of CL-N1923 levextrel resin was described. The extraction behavior of tungsten and arsenic by the CL-N1923 levextrel resin at alkalescence and the conditions for separating trace arsenic from a solution containing large amount of tungsten were investigated. The experimental results of static method and flowing method showed that CLN1923 levextrel resin may separate arsenic from impure Na_2WO_4 solution effectively. In the postextraction solution, the ratio of As/W may drop to 0.003%～0006% from 0.04%～0.08%. The trace tungsten and the large amount of arsenic extracted by CL-N1923 levextrel resin can be easily eluted with 1% Na_2CO_3 solution, at the same time, and the resin was renewed.