摘要
络合萃取法分离极性有机物稀溶液具有高效性和高选择性。在已有工作基础上,利用三正辛胺(TDA)、磷酸三丁酯(TBP)为络合剂,正辛醇、甲墓异丁基酮(MIBK)或煤油为稀释剂,在较宽的pH值条件下实验测定了酚类稀溶液的萃取相平衡分配系数;讨论了络合剂种类、络合剂浓度、稀释剂种类以及被萃取溶质种类对络合萃取相平衡分配系数的影响;提出了同时考虑络合萃取作用和物理萃取作用的平衡分配系数的表达式。
The separation technique of solvent extraction based on reversible chemical complexation can have high capacity and high selectivity for separating polar organic solutes from dilute solution. By using TOA and TBP as complexing agents, n - octanol, MIBK or kerosene as diluent, a series of extraction equilibrium experiments for phenolic aqueous solutions were carried out. In a wide - range of pH the effects of solutes, type and concentration of complexing agents, pH value of aqueous solutions and diluents on distribution ratio D are discussed. An expression of equilibrium distribution that includes chemical complexation and physical extraction simultaneously has been proposed.
出处
《化工学报》
EI
CAS
CSCD
北大核心
1997年第6期706-712,共7页
CIESC Journal
基金
国家自然科学基金资助项目(No.29306043)
关键词
络合萃取
酚类
溶液酸度
PH值
萃取
分离
extraction based on chemical complexation, phenols, solution acidity
