硝酸溶液中铌的溶剂萃取研究 Ⅴ.某些金属对TBP从硝酸中萃取铌的影响

A STUDY OF SOLVENT EXTRACTION OF NIOBIUM FROM NITRIC ACID SOLUTION V. AN EFFECT OF SOME METALS ON EXTRACTION OF NIOBIUM WITH TBP

摘要: 研究了在1～8mol/l HNO_3的水相中不同浓度的锆、钼和锆同时存在以及铀和镨等对TBP萃取铌的影响。结果表明:1.当1×10~(-8)mol/l4mol/l时,随着水相初始锆浓度增加,D_(Nb)增加;而HNO_3<4mol/1 HNO_3时,随着锆浓度增加,D_(Nb)减小。2.在水相中同时存在钼和锆会使D_(Nb)增加。在钼和锆的浓度小于1×10~(-2)mol/l的情况下,硝酸浓度为3mol/l时D_(Nb)最小。

Abstract: The paper deals with a behaviour of extraction of niobium with TBP in thepresence of molybdenum and zirconium, uranium, or praseodynium in the aqueousphase. The dependence of extraction of nionium with TBP on the concentrations ofzirconium in 1～8 mol/l HNO_3 is described. The results show: 1. In the concentrations of 1×10~(-3) mol/l