1,9-双(1＇-苯基-3＇-甲基-5＇-氧代吡唑-4＇-基)壬二酮-1,9与TOPO协同萃取钍(Ⅳ)机理的研究

THE INVESTIGATION OF SYNERGISTIC EXTRACTION OF THORIUM WITH 1,9-BIS- ( 1 -PKENYL-3'-M ETHYL-5 -OXOPYRAZOLE-4 -YL ) NONANEDIONE-(1 ,9) (H_2A) AND TRIOCTYLPHOSPHINE OXIDE ( TOPO )

摘要: <正> 一、前言 1,9-双(1′-苯基-3′-甲基-5′-氧代吡唑-4′-基)壬二酮-1,9 (简称H_2A)为新近合成的一种双-β二酮螯合剂,它较HPMBP类试剂多一倍螯合功能团,不但能与钍(Ⅳ)形成较稳定的可萃络合物,而且还能与某些中性萃取剂产生协萃作用。本文以氯仿为溶剂研究了它对钍(Ⅳ)的单独萃取及它与三辛基氧膦(TOPO)协同萃取钍的作用,测得了萃合物的组成为ThA_2·TOPO。求得单独萃取和协同萃取反应的平衡常数分别为β_(20)=1.03×10~8和β_(21)=1.18×10~9。

Abstract: In this paper, the extraction of thorium in nitric acid with H2A-CHCl3 solution and synergistic extraction of thorium in nitric acid by H2A and TOPO have been investigated. Experimental results show that the composition of the extracted complexes are ThA2 and ThA2 -TOPO ,and the extraction equilibrium constants are 1.03×106 and 1.18×109 respectively.