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研究了用α-羟基肟、5,8-二乙基 - 7-羟基十二烷 - 6-单肟 ( L IX63)溶剂从酸性和中性溶液中萃取Mo( )和 W( )。 Mo( )的萃取率比 W( )的萃取率高得多。在硝酸溶液浓度达到 5mol/L时 ,Mo( )近乎于被定量萃取 ,但在更高酸浓度下 ,萃取率下降。在较短的接触时间内 ,W( )的萃取率相当低。从大量 W( )中分离 Mo( )是在 p H约为 1、接触 10 min条件下进行的 ,得到的分离系数αMo( =DMo/DW) =1.66。 Mo( )可与几种金属离子如 Fe( )、Co( )、Ni( )、Zn( )和 Cu( )分离。在高的硝酸浓度下 ,通过较长时间的搅拌 ,优先萃取出 W( )。萃合物的元素分析和红外光谱、核磁共振谱的分析表明 ,2个 L IX63分子与 Mo O2 +2 和 WO2 +2 配位。
The extraction of Mo () and W () from acidic and neutral solutions using α-hydroxyoxime, 5,8-diethyl-7-hydroxydodecane-6-monoxime (L IX63) solvent was studied. The extraction rate of Mo () is much higher than that of W (). In the nitric acid solution concentration of 5mol / L, Mo () is almost quantitative extraction, but at higher acid concentrations, the extraction rate decreased. In a short contact time, W () extraction rate is quite low. The separation of Mo () from a large amount of W () was carried out at a pH of about 1 for 10 min and the resulting separation factor αMo (= DMo / DW) = 1.66. Mo () can be separated from several metal ions such as Fe (), Co (), Ni (), Zn () and Cu (). Under high nitric acid concentration, W () is preferentially extracted by agitation for a longer period of time. Elemental analysis of the complexes and IR and NMR spectra showed that two L IX63 molecules coordinated with Mo O2 +2 and WO2 +2.