SOLVENT EXTRACTION OF MOLYBDENUM AND VANADIUM WITH HBL(R) 101:SPECIATION AND MECHNISM
The molar ratio of reaction between molybdenum and the anti isomer of HBL(@)101 oxime (H2ox) in the extraction can be inferred to 1∶2 using the saturation extraction method, suggesting that the Mo-HBL(@) 101 oxime complex is MoO2 (Hox)2.Similarly, the molar ratio between vanadium and the HBL(@) 101 oxime was determined to be 1∶1,suggesting that the V-HBL(@)101 oxime complex is VO2(Hox).The 1H NMR spectrum of the Mo-HBL(@)101complex suggested that the predominant molybdenum species, MoO22+, coordinated the extractant through the hydroxyl proton and a lone pair of electrons of the nitrogen of the HBL(@)101 oxime to form Mo-HBL(@)101 complexes, indicating a chelating mechanism for the extraction reaction.The structure of the Mo-HBL(@)101 complex species and the mechanism were confirmed by the infrared spectrum.The 1H NMR spectrum of the VHBL(@)101 complex suggested that the predominant vanadium species, VO2+ , could coordinate the extractant through either (1) the hydroxyl proton alone;or (2) the hydroxyl proton and a lone pair of electrons of the nitrogen of the HBL(@)101 oxime.The infrared spectra showed that the complexation is most likely via the cation exchange of the hydroxyl proton.
Li Zeng Yoko Pranolo Chu Yong Cheng
Institute of Powder Metallurgy,Central South University,Changsha,China;School of Metallurgy and Envi parker Centre / CSIRO Minerals Down Under National Research Flagship,Australia
国内会议
第六届稀有金属冶金学术委员会全体委员工作会议暨全国稀有金属学术交流会
厦门
英文
236-244
2013-10-22（万方平台首次上网日期，不代表论文的发表时间）