乳状液膜法分离钨钼的研究弱碱性体系

Separation of tungsten and molybdenum by emulsion liquid membrane weak basic separation system

进行了以氯化甲基三烷基铵（Ｎ２６３）为载体的乳状液膜在弱碱性条件下分离钨、钼的研究．利用钨、钼形成同多酸能力的差异，通过载体选择性迁移钨来分离钨、钼．考察了影响钨、钼分离的各种因素，得到了分离钨、钼的最佳操作条件．按某厂生产仲钨酸铵的料液中含钼８．９×１０－４ｍｏｌ／ｄｍ３计算，经一级间歇式分离即可降至１．６×１０－４ｍｏｌ／ｄｍ３达到要求（含钼低于２．１×１０－４ｍｏｌ／ｄｍ３）

The separation of W and Mo in weak basic solution by emulsion liquid membrane was studied. Kerosene containing trialkyl methyl ammonium chloride (R 3CH 3NCl,R=C 8～C 10 ),LMA 1(a kind of nonionic surfactant made by our Institute) and 2-ethyl hexanol was used as oil phase, NH 4Cl soluion was used as internal aq. phase. In pH7￣8 tungsten and molybdenum existed as HW 6O 5- 21 and MoO 2- 4 respectirley, the carrier selectively transfered HW 6O 5- 21 into the internal aq.phase. The experimental results demonstrated that the effect of separation of W and Mo was best at pH 7.2￣7.3.