高效液膜法分离富集钼(Ⅵ)与钨精矿中痕量钼的测定

SEPARATION AND EXTRACTION OF MOLYBDENUM(Ⅵ) BY HIGH PERFORMANCE LIQUID MEMBRANE METHOD AND DETERMINATION OF TRACE MOLYBDENUM IN TUNGSTEN CONCENTRATES

用TBP－TOPO（协同载体）、N113℃（表面活性剂）、液体石蜡（增强刑）、煤油（溶剂）和内相（1mol／LNaOH水溶液）乳状液膜体系，研究了钙（Ⅵ）的迁移富集行为，确定了用此液膜迁移分离钻（Ⅵ）的最适宜实验条件．钼（Ⅵ）在20min可迁移速率达99·65％以上。在同样条件下，一些共存金属高于如W^6+、Fe^3+、A1~2+Ca^2+Mg^2+Mn^2+Ph^2+Zn^z+Cu^2+、Co^2+、Ni^2+、Sn^2+等通过化液膜，迁移率很低或不被迁移，只有钼（Ⅵ）能被迁移富集，因此用（Ⅵ）可与这些金属离子得到很懑意的分离．它集后的溶液用分光光应法测定钼．此法已成功地应用到测定钨精矿中的痕量钼，相对标准偏差小平3．8％，结果满意．

The transport extraction behaviour of Mo (w ) through the emulsion liquid membrane system oftrinbutyl phosphate (TBP )-TOPO (synergetic carrier )-N113℃ (surfactant )-liquid paraffin-kerosene (solvent ) internal phase (1 mol /L NaOH solutions )that transporting Mo (W ) completely and rapidltiy was carried out underoptimal experimental conditions。 The transport rate of Mo(M ) in 20 min is ab0ve 99。 65 %. In this case,rnany co existed metal ions, such as W^6+, Fe^3+. Al^3+, Ca^2+, Mg^2+ ， Mn^2+, Pb^2+ ， Zn^2+, Cu^2+, Co^2+, Ni^2+, Sn^4+ etc. Can nottransport through this emulsion liquid membrane. So Mo (W ) can be separated from these metal ions withsatisfactorily. The enriched solutions are spectrophotometric method determination of Mo. The methed has haensuoceessfully applied to the determination of trace Mo (in ) in tungsten concentrates with relative standarddeviation of less than 3. 8 % , satisfactory results.