TBP和N523对H_(3)BO_(3)、HCl萃取性能对比研究  

Comparative Study on Extraction Properties of TBP and N523 on H_(3)BO_(3) and HCl

作　　者：彭小五 时东[1,2] 谢绍雷 张禹泽[1,2] 姬连敏 李丽娟 PENG Xiaowu;SHI Dong;XIE Shaolei;ZHANG Yuze;JI Lianmin;LI Lijuan(Key Laboratory of Green and High-end 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)

机构地区：[1]中国科学院青海盐湖研究所,盐湖资源绿色高值利用重点实验室,青海西宁810008 [2]青海省盐湖资源综合利用工程技术中心,青海西宁810008

出　　处：《盐湖研究》2024年第6期56-64,共9页Journal of Salt Lake Research

基　　金：青海省自然科学基金青年项目(2019-ZJ-962Q);中国科学院青年创新促进会项目(2021430)。

摘　　要：文章以研究较多的从高镁锂比卤水中萃取提锂的中性磷酸酯类锂萃取剂“磷酸三丁酯”(TBP)和酰胺类锂萃取剂二-2-乙基己基乙酰胺(N523)为代表,系统考察了TBP和N523对H_(3)BO_(3)和HCl的萃取性能。结果表明:TBP对H_(3)BO_(3)的萃取能力远强于N523,TBP与H_(3)BO_(3)形成的络合物结构为H_(3)BO_(3)·2TBP,MgCl_(2)对TBP和N523萃取H_(3)BO_(3)均有明显的盐析效应;N523对HCl的萃取能力强于TBP,MgCl_(2)和LiCl对TBP和N523萃取HCl均具有明显的盐析效应。In this paper,the extraction performance of neutral lithium phosphate extractant(TBP)and amide-based lithium extractant(N523)for H_(3)BO_(3) and HCl was systematically investigated.The two extractants mentioned above were mainly applied to the study of lithium extraction from brines with high Mg/Li ratio.The results showed that the extraction ability of TBP for H_(3)BO_(3) was much stronger than that of N523,and the structure of the complex formed by TBP and H_(3)BO_(3) was H_(3)BO_(3)-2TBP.MgCl_(2)has a significant salting-out effect on the extraction of boric acid by TBP and N523.The extraction ability of N523 for HCl was stronger than that of TBP,and MgCl_(2) and LiCl had a significant salting-out effect on HCl extraction by both TBP and N523.The results of the study can provide some theoretical guidance for the subsequent optimization of the process conditions of lithium extraction from boron-containing brines using these two types of lithium extractants.

关 键 词：TBP N523 盐湖卤水 硼酸 

分 类 号：TQ131.13[化学工程—无机化工]