摘要
以P204(磷酸二(2-乙基己基)酯)为络合剂,加氢煤油为稀释剂,实验研究了不同的有机胺类稀溶液的络合萃取特性,讨论了有机胺类的pK_a值、络合剂的含量和溶液pH值等因素对络合萃取平衡的影响,提出了同时考虑络合萃取作用和物理萃取作用的萃取相平衡分配系数表达式。利用傅立叶红外谱图分析了P204络合萃取有机胺类的机理。
The extraction equilibrium characteristics of amine solution systems have been studied. D2EHPA(in kerosene) is selected as a solvent to separate amines from dilute solution. The effects of pKa of amines, complexing agent concentration, and pH of solutions are discussed. An expression of equilibrium distribution that includes chemical complexation and physical dissolution simultaneously has been proposed. With the FT-IR spectroscopy, mechanism on of amines with D2EHPA is investigated.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1997年第6期713-720,共8页
CIESC Journal
基金
国家自然科学基金资助项目(No.2929051)
关键词
络合萃取
有机胺
萃取
稀溶液
分离
extraction based on chemical complexation, amines, D2EHPA
