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用乳状液膜体系对铼进行分离富集。该体系包括流动载体 (二苯并 - 1 8-冠 - 6,简称DBC)、表面科学研究性剂 (L1 1 3B)、溶剂 (CCl4和n -Hexane油状物 )以及内相 (NaClO4溶液 )。研究了乳状液膜的稳定性、温度、铼的浓度、外相硫酸的浓度、乳水比 (Rew)、油内比 (Roi)等因素对富集铼的影响。实验结果表明 ,在适宜的条件下 ,铼的富集率可达 99.5%～ 1 0 0 .5%。在相同条件下 ,常见共存离子如Mo6 +、W6 +、Fe3+、Al3+、Cu2 +、Pb2 +、Ni2 +、Zn2 +、Mn2 +、Mg2 +、Ca2 +、Sr2 +、Ba2 +、Cd2 +、Sn4+、Cr3+、Bi3+、K+、Na+、Li+、NH+4、Cs+、Cl- 、SO2 -4 、NO-3 、SiO2 -3 、PO3-4 等 ,都不迁移透过这乳状液膜。只有ReO-4 及K+可与这些离子得到满意的分离。此法用于富集测定钼精矿、复杂 (多金属 )矿石和合金中的微量铼 ,结果相当满意。
Rhenium was separated and enriched by emulsion liquid membrane system. The system consisted of a mobile vehicle (dibenzo-1-crown-6, DBC for short), surface science investigator (L1 1 3B), solvent (CCl4 and n-Hexane oil) and internal phase (NaClO4 solution). The effects of emulsion film temperature, rhenium concentration, concentration of out-phase sulfuric acid, Rew ratio and Roi on rhenium enrichment were investigated. The experimental results show that the enrichment rate of rhenium can reach 99.5% -100.5% under appropriate conditions. Under the same conditions, common coexisting ions such as Mo6 +, W6 +, Fe3 +, Al3 +, Cu2 +, Pb2 +, Ni2 +, Zn2 +, Mn2 +, Mg2 +, Ca2 +, Sr2 +, Ba2 +, Cd2 +, Sn4 + , Cr3 +, Bi3 +, K +, Na +, Li +, NH + 4, Cs +, Cl-, SO2-4, NO-3, SiO2-3, PO3-4, etc. do not migrate through the emulsion film. Only ReO-4 and K + are satisfactorily separated from these ions. This method is very satisfactory for the enrichment of traces of rhenium in the determination of molybdenum concentrates, complex (polymetallic) ores and alloys.