由于二(2-乙基己基)磷酸(P204)对稀土的萃取能力过强,对重稀土反萃取较困难,而改变二烷基磷酸类萃取剂的烷基结构有可能改善它对重稀土的反萃取性能。本研究考察了二(β-丁基辛基)磷酸(DDPA),二(β-己基癸基)磷酸(DHDPA-1),二(10-乙基十四烷基-7)磷酸(DHDPA-2)和二[β-(1,3,3-三甲基丁基),5,7,7-三甲基辛基]磷酸(DODPA)四种具有长碳链结构的萃取剂对稀土的萃取和反萃取性能,并与二(2-乙 Since the extraction ability of rare earth by di (2-ethylhexyl) phosphoric acid (P204) is too strong, the stripping of heavy rare earth is more difficult. Changing the alkyl structure of dialkylphosphate extractant may improve its effect on heavy rare earth Stripping performance. In this study, we investigated the effects of di (β-butyloctyl) phosphate (DDPA), di (β-hexyldecyl) phosphate (DHDPA-1), di (10-ethyltetradecyl- 2) and two [β- (1,3,3-trimethylbutyl), 5,7,7-trimethyl octyl] phosphate (DODPA) four kinds of extractant with long carbon chain structure of rare earth Extraction and stripping performance, and with two (2-B