Abstract: Decomposition of tungsten ore concentrate is usually carried out by alkaline process and the intermediate product is crude sodium tungstate. It contains many impurities among which phosphorus is one of the most harmful elements. By using a solvent consisting of petroleum sulfoxide (PSO) and a diluent, the small amount of phosphorus can be removed almost completely in low acidic solution, i. e. at pH = 2.5 by countercurrent-multistage extraction. The extraction species is most likely H3PW12O40·PSO.

摘要： 本文提出了一个用溶剂萃取方法分离钨、磷以制取高纯钨产品的过程,实验研究了最适宜的萃取条件,证实该过程适用于钨冶金工业中钨酸钠溶液的净化.