乳状液膜法分离钨钼的研究酸性体系

Separation of tungsten and molybdenum by emulsion liquid membrane acidic separation system

研究了以三烷基氧化膦（ＴＲＰＯ）为载体、ＮａＯＨ为反萃试剂的液膜体系在酸性介质中进行的钨钼分离．其特点是利用钨、钼与Ｈ２Ｏ２生成的过氧化合物的迁移性能的显著差异来分离钨钼．考察了影响钨钼分离的诸因素．经二级间歇液膜处理，Ｍｏ／ＷＯ３（重量比）从０．５％降到０．００１％以下，达到要求（最高级钨酸产品要求钼含量不大于０．００８％）．本文提供了一种适用于从盐酸分解钨酸钙精矿制取钨酸时分离钨钼的新方法．

The separation of W and Mo in acidic solution by emulsion liquid membrane was studied.Kerosene containing trialkyl phosphoine oxide(R 3PO,R=C 6～C 8)and LMA 1(a kind of nonionic surfactant made by our Institute) were used as oil phase,sodium hydroxide solution was used as internal aq.phase.In this system,molybdenum selectively transfered into internal aq.phase by adding hydrogen peroxide into external aq.phase.Through two stages of bench test,the Mo:WO 3 ratio in solution decreased from 0.5% to 0.001% .