摘要
前言以环烷酸为萃取剂分离稀土元素,十余年来有很大进展,但用于稀土之间的分离工作发表的不多;1974年以来国内成功地用它分离了钇和非钇稀土;至于对非钇稀土之间的分离未见报导。在环烷酸萃取体系中,相邻轻稀土的分离因数,以镧与铈之间较大,βCe/La2.2～2.4。我们曾研究了镧铈镨钕混合氯化物（RECl3=0.51M）——1.8M环烷酸（氨化率48％）煤油溶液萃取体系中轻稀土的分配,测得βCe/La～2.5,βPr/Ce～1.2,βNd/Pr～1.3表明环烷酸适用于轻稀土、特别是无铈轻稀土中镧的分离。工业级环烷酸作为萃取剂有易乳化的缺点,目前均加入异味较重的C9—C11混合醇或辛醇破乳,同时也要求提供防止乳化的其它方法。为了考察环烷酸萃取分离轻稀土的性能,本文用经过纯化的一定馏份环烷酸（以煤油为稀释剂）在氨化率45％时不使用其它添加剂,在单级萃取平衡的基础上。
The separation of Lanthanum from Praseodymium and Neodymium in the system of RECl_3 0.62M(RE=La, Pr, Nd)/H_2O—HCl PH=3.4—3.7/HA in Kerosene 1.6M(ammoniated 45%) with Naphthenic Acids (HA) as extracting agent and designed by using the Optimum equations of the theory of multistage extraction was investigated. As a result of the imitative experiment on 20 stages of two-solvent counter current extraction, the pure Lanthanum Oxide (purity>99.96％, recovery>90%) and a mixture oxide rich in Praseodymium and Neodymium were obtained.
出处
《内蒙古大学学报（自然科学版）》
CAS
1979年第1期65-69,共5页
Journal of Inner Mongolia University：Natural Science Edition
