CAJ | 학술논문

为了获得高纯单一的稀土元素,利用萃取法从盐酸体系中分离铈Ce3+和镨Pr3+.以P507为萃取剂,煤油为稀释剂,正辛醇为添加剂,对CeCl3和PrCl3进行萃取实验研究,考察了料液浓度和酸度、P507浓度和皂化率对稀土金属分离的影响.结果表明, Ce3+和Pr3+的萃取率随P507浓度的增大而增大,随P507皂化率提高而先增大后减小,皂化率应该保持在50%以内,以防乳化现象;在pH为3~4时,原料液质量浓度0.5g/L,皂化率40%时,0.05mol/LP507对Ce3+和Pr3+萃取率均达到99%以上,分离因子可以达到2.28;2mol/LHCl对CeCl3和PrCl3进行反萃,反萃率均可以达到100%.
위료획득고순단일적희토원소,이용췌취법종염산체계중분리시Ce3+화보Pr3+.이P507위췌취제,매유위희석제,정신순위첨가제,대CeCl3화PrCl3진행췌취실험연구,고찰료료액농도화산도、P507농도화조화솔대희토금속분리적영향.결과표명, Ce3+화Pr3+적췌취솔수P507농도적증대이증대,수P507조화솔제고이선증대후감소,조화솔응해보지재50%이내,이방유화현상;재pH위3~4시,원료액질량농도0.5g/L,조화솔40%시,0.05mol/LP507대Ce3+화Pr3+췌취솔균체도99%이상,분리인자가이체도2.28;2mol/LHCl대CeCl3화PrCl3진행반췌,반췌솔균가이체도100%.
Rare earths, provided with special physical and chemical properties, are generally used in metallurgy, petrochemical industry, various functional materials and glass ceramics. Ce3+ and Pr3+ have been separated from HCl solution by extraction to obtain single rare earth using P507 as extraction agent, kerosene as diluent, and octyl alcohol as additive. The effect of concentration and saponification ratio of P507, the pH and metal concentration of feed liquid on the separation of Ce3+ and Pr3+ were studied. The results show that the saponificated P507 has a good extraction performance for Ce3+ and Pr3+. As saponification ratio increases, the extraction efficiency of Ce3+ and Pr3+ increases and then decreases. The saponification ratio should not be higher than 50% to avoid emulsification. When the pH of feed liquid keeps between 3 and 4, the mass concentration of feed liquid is 0.5 g/L, saponification ratio is 40%, the extraction efficiency of Ce3+ and Pr3+ can achieve more than 99% and separation factor 2.28. As for stripping, both Ce3+ and Pr3+ can be totally stripped from organic phase by 2 mol/L HCl.