摘要
(7)^Li由于其中子反应截面较小,可以用作核工业中的中和剂、载热剂,其自然丰度为92.5%,为达到核工业应用需要的丰度(99.99%),必然要进行(7)^Li的富集。β-双酮及其衍生物为常见的具有富集(7)^Li效应的螯合剂。以含有季铵盐和1-羟基-4-对甲苯胺基蒽醌的苯甲醚溶液作为有机相,碱性锂盐溶液作为水相,两相振荡混合得到富集(7)^Li的沉淀,并对其分离性能进行考察。研究发现随着少量季铵盐的引入,在高碱性的条件下螯合剂利用率以及沉淀相(7)^Li丰度得到了很大的提升。还优化了反应条件,计算了同位素交换的热力学参数。
Due to(7)^Li with small neutron reaction cross section,(7)^Li can be used as the neutralizer and the heat carrier in the nuclear industry.The natural abundance of(7)^Li is 92.5%.It is necessary to enrich(7)^Li in order to reach the requirement of(7)^Li abundance(99.99%)in the nuclear industry.β-diketone and its derivatives are common chelating agents for the enrichment of(7)^Li.In this paper,anisole solution containing quaternary ammonium salt and 1-hydroxy-4-p-toluidine anthraquinone as the organic phase and alkaline lithium ion solution as the aqueous phase were used to obtain the precipitation enriched with(7)^Li by oscillating mixture,and its separation performance was investigated.It was found that with the introduction of a small amount of quaternary ammonium salt,the utilization rate of chelating agent and the(7)^Li abundance of deposition phase were improved under high alkaline conditions.The reaction conditions were optimized and the thermodynamic parameters of isotope exchange were calculated.
作者
薛子轩
景燕
张鹏瑞
汪词明
毛连婧
居慧群
周小龙
孙进贺
贾永忠
XUE Zi-xuan;JING Yan;ZHANG Peng-rui;WANG Ci-ming;MAO Lian-jing;JU Hui-qun;ZHOU Xiao-long;SUN Jin-he;JIA Yong-zhong(Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China;Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources,Xining,810008,China;University of Chinese Academy of Sciences,Beijing,100049,China)
出处
《盐湖研究》
CAS
CSCD
2023年第1期96-105,共10页
Journal of Salt Lake Research
基金
青海省重点研发与转化计划项目(2021-GX-104,2019-GX-169)
中国科学院青年创新促进会项目(2015351)。
