前言 我国工人阶级、技术人员在“自力更生”精神的指引下研制成甲基膦酸二仲辛酸(p-350)。它已成为铀、钍分离,萃取稀土,尤其为分离镧的特效萃取剂。 p-350-HNO,体系比较简单,工艺性能也较稳定,而且与分离镧(La)是同一体系,若能把La、pr、Nd、Sm、Eu等镧系元素的分组或分离联结起来是有意义的。但有关该体系的分离因数及分配平衡、萃合反应热效应等研究,前者工作(1)较为零 Foreword The working class and technical staff of our country have developed the methylpacidic acid (p-350) under the guidance of the spirit of “self-reliance.” It has become uranium, thorium separation, extraction of rare earths, especially for the separation of lanthanum special effects extractant. p-350-HNO, the system is relatively simple, the process performance is relatively stable, and is the same system as the separation of lanthanum (La). If the grouping or separation of lanthanides such as La, pr, Nd, Sm and Eu can be combined meaningful. However, the separation factor and the distribution of the system balance, extraction reaction heat effects and other studies, the former work (1) is more zero