在盐酸体系中，以２５％Ｐ２０４＋改质剂＋６０％煤油为萃取有机相，酸度为４０ｍｏｌ／Ｌ，相比Ｏ／Ａ＝００５，室温条件下，测定了钪、铁、锰的分配比为ＤＳｃ＝２８００，ＤＦｅ＝０３１２，ＤＭｎ＝０３２０；钪的萃取率为ηＳｃ＝９９３％，ηＦｅ＝１５３％，ηＭｎ＝１５６％．钪与铁和锰的分离系数β（Ｓｃ，Ｆｅ）＝８９７×１０３，β（Ｓｃ，Ｍｎ）＝８７５×１０３；萃取平衡时间为１０ｍｉｎ；考察了酸度、萃取剂浓度对萃取的影响，并用两种方法测定、绘制了萃取等温线． In hydrochloric acid system, the organic phase was extracted with 25% P204 + modifier and 60% kerosene, the acidity was 40mol / L, compared with O / A = 005, the scandium, iron and manganese The partition ratios were DSc = 2800, DFe = 0312, DMn = 0320. The scandium extraction efficiencies were ηSc = 993%, ηFe = 153%, ηMn = 156%. The separation coefficient of scandium and iron and manganese was 897 × 103, β (Sc, Mn) = 875 × 103. The extraction equilibrium time was 10 min. The effects of acidity and extractant concentration on the extraction Influence, and measured in two ways, drawing the extraction isotherm.