摘要
文章主要研究了在30％TBP-十二碳异羟肟酸-煤油-HNO_3和十二碳异羟肟酸-氯苯-二甲苯-HNO_3两个萃取体系中,萃取剂浓度、酸度、铀和稳定锆浓度及温度等因素对Zr萃取分配系数的影响。经0.01mol/l HNO_3和5％Na_2CO_3洗涤后的有机相中Zr的保留影响因素也进行了研究。还初步探讨了十二碳异羟肟酸萃取Zr的反应机制,得出萃合物中十二碳异羟肟酸与Zr的比值为2:1。在TBP-煤油体系中有异羟肟酸存在时,Zr的萃取和洗涤后的保留均明显增加,在萃取时容易生成界面物。
The extraction behaviour of Zr in TBP-laurc-hydrcxaroic acid (LHA)-kerosene-HNO3 and LHA-chloicbenzene-xylece-FNO3 systems is studied. The factors influencing the retention cf Zr in organic phase scrubbed by 0.01 mol/1 HNO3 and 5% Na2CO3 solution are also studied. The mechanism of extraction of Zr by LHA is studied preliminarily. The composition of the complex extracted is found to be Zr(NO3)2 (CH3(CH2)10CONEO)2. With the presence of LHA in TBP-kerosene-HNO3 systerr, the distribution coefficient and retention of Zr increase obviously and the tendency towards forming interfacial crud becomes apparent. The retention cf Zr in scrubbed organic phase depends on the ccrcenlraticns cf LHA and HNO3 and the temperature. The retention of Zr increases as [LHA] increases, When [HNO3] of the system is 1 mol/1, [LHA] in (?)% TEP-kerosene is 3.5×10-4 mol/l and 5×10-4 mol/1, the retention cf Zr is^25% and~ 85% respectively. Put the retention of Zr decreases with increasing [HNO3] and temperature.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
1991年第3期150-156,共7页
Journal of Nuclear and Radiochemistry
关键词
锆
萃取
异羟肟酸
TBP
Zirconium, Lauro-hydroxamic acid, TBP, Extraction, Degradation.
