【摘要】 合成了二苯基二硫代膦酸(DPDTPI)、二氯苯基二硫代膦酸(DCPDTPI)、二甲基苯基二硫代膦酸(DMP-DTPI)、二(2,5-二甲基苯基)二硫代膦酸(DDMPDTPI)和二(3,5-二氯-4-甲基苯基)二硫代膦酸(DDCMPDT-PI)共5种二芳基二硫代膦酸类萃取剂,并研究了它们的二甲苯溶液在HClO4-NaClO4体系中,对Am(Ⅲ)和稀土元素的萃取行为。结果表明,萃取能力按DDCMPDTPI>DMPDTPI>DPDTPI>DCPDTPI>DDMPDTPI的顺序减弱;对镅的萃取选择性由大到小的顺序为:DCPDTPI>DPDTPI>DDMPDTPI>DMPDTPI>DDCMPDTPI,所获得的最大分离因数α(Am/Eu)分别为21,4.4,1.8,1.3和1.0。5种二芳基二硫代膦酸对镧系元素的萃取均为正序萃取。更多还原

【Abstract】 Diphenyldithiophosphinic acid（DPDTPI）,dichlorophenyldithiophosphinic acid（DCPDTPI）,dimethylphenyldithiophosphinic acide（DMPDTPI）,di（2,5-dimethylphenyl） dithiophosphinic acid（DDMPDTPI）,and di（3,5-dichloro-4-methylphenyl） dithiophosphinic acid（DDCMPDTPI） were synthesized.The extraction of Am（Ⅲ） and Ln（Ⅲ） from 0.1 mol/L NaClO₄ medium with these diaryldithiophosphinic acids in xylene were investigated.The experimental results show that the order of extraction ability is DDCMPDTPI > DMPDTPI > DPDTPI > DCPDTPI > DDMPDTPI,and extraction selectivity for Am（Ⅲ） is DCPDTPI > DPDTPI > DDMPDTPI > DMPDTPI > DDCMPDTPI.The obtained maximum separation factors（Am/Eu） are 21,4.4,1.8,1.3 and 1.0 for DCPDTPI,DPDTPI,DDMPDTPI,DMPDTPI and DDCMPDTPI,respectively.The lg D increases with atomic number of lanthanide for 5 extractants.更多还原