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目前采用二(2-乙基己基)磷酸(D2EHPA)从硫酸溶液中萃取铟在生产上虽获得广泛应用,但反萃取又转入盐酸体系,腐蚀刺激性较强.改用D2EHMTPA萃取铟可能较好,有关这方面的研究至今尚未见报道,本文从硫酸溶液中考察了D2EHMTPA萃取铟的性能,并与D2-EHPA和二(2-乙基己基)二硫代磷酸(D2EHDTPA)作比较,以了解这类萃取剂结构上的差别对萃取铟的影响,这对选择及合成高效能萃取剂分子也是有意义的,还应用斜率法、饱和法确定了萃取平衡反应及萃合物组成,根据IR与NMR探讨了D2EHMTPA萃取铟的机理。
At present, the extraction of indium from sulfuric acid solution by di (2-ethylhexyl) phosphoric acid (D2EHPA) is widely used in the production, but the stripping is transferred to the hydrochloric acid system and the corrosion irritation is stronger. The extraction of indium with D2EHMTPA may be more Good, the research on this aspect has not been reported until now, this paper investigated the performance of D2EHMTPA extraction of indium from sulfuric acid solution and compared with D2-EHPA and D2 (2-ethylhexyl) phosphorodithioic acid (D2EHDTPA) Understanding the differences in the structure of these extractives on the extraction of indium is of great significance for the selection and synthesis of high-performance extractant molecules. The slope equilibrium method and the saturation method are also used to determine the extraction equilibrium and the composition of the extract. According to IR The mechanism of extraction of indium by D2EHMTPA was discussed with NMR.