Fundamentals of the Use of Mixed Solvents in Solvent Extraction of Metal Ions

使用混合溶剂溶剂萃取金属离子的基础知识

• 批准号: 06640780
• 负责人: YAMADA Hiromichi
• 金额: $ 1.28万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06640780/
• 关键词: Mixed Solvent; Solvent Extraction; Extraction of Cu (II)-benzoates; Benzene; 1-Octanol; 2-Octanone; Partition Constant; Solvent Effect; 安息香酸の分配平衡; 2量化定数

The solvent extraction systems, which consist of copper (II), benzoic acid and 1-octanol-benzene or 2-octanone-benzene mixed solvents, were selected for the purpose of studying the effects of mixed solvents on the solvent extraction of metals. In the analysis of the extraction equilibrium on the extraction of metal ion with an extracting reagent, it is indispensable to have information about the partition of the extracting agent. The partition and dimerization constants ofbenzoic acid have been determined in the 1-octanol-benzene and 2-octanone-benzene mixed solvent systems. The increase in the partition constant of monomeric benzoic acid and the decrease in the decrease in the dimerization constant of the acid in the organic phase were quantitatively explained taking into account solvation of monomeric benzoic acid by one 1-octanol or 2-octanone molecules. But, in a higher 1-octanol region of 1-octanol-benzene mixed solvents, the partition and dimerization constants were found to beco … More me smaller than those predicted by solvation of the monomeric acid by one 1-octanol molecule. This is attributable to hydration of the monomeric benzoic acid because of increasing the concentration of water with increasing content of 1-octanol in the mixed solventsBy using the same 1-octanol-benzene and 2-octanone -benzene mixed solvents with a wide variety of mixing ratio as those used for the analysis of the partition equilibrium of benzoic acid, the extraction of copper (II) with benzoic acid was carried out. The monomeric and dimeric copper (II) benzoates were found to be responsible for the every extraction systems. In the present mixed solvent systems, the following relation between the partition constants of CuA_2 (main monomeric extracted species) and HA (monomeric benzoic acid) was found to be hold : KD,CuA_2=CKD,HA^2, which C is the certain constant corresponded to the each similar series of solvents. In addition, it has been proved that the present mixed solvents with a certain composition are superior to chloroform in the extraction of copper (II) with benzoic acid. Less

选择由铜（II）、苯甲酸和1-辛醇-苯或2-辛醇-苯混合溶剂组成的溶剂萃取体系，研究混合溶剂对溶剂萃取金属的影响。在分析萃取剂萃取金属离子的萃取平衡时，必须了解萃取剂的分配情况。测定了苯甲酸在1-辛醇-苯和2-辛醇-苯混合溶剂体系中的分配常数和二聚化常数。考虑到单体苯甲酸被一个1-辛醇或2-辛酮分子溶剂化的情况，定量地解释了单体苯甲酸分配常数的增加和酸在有机相中二聚化常数的减小。但在1-辛醇区较高的1-辛醇-苯混合溶剂中，分配常数和二聚化常数比单个1-辛醇分子溶剂化所预测的要小得多。这是由于单体苯甲酸的水化作用，因为随着混合溶剂中1-辛醇含量的增加，水的浓度也随之增加。采用与苯甲酸分配平衡分析相同的1-辛醇-苯和2-辛酮-苯混合溶剂，混合比例不同，进行了苯甲酸对铜（II）的萃取。发现单体和二聚体苯甲酸铜（II）对每一种萃取体系都有影响。在目前的混合溶剂体系中，发现CuA_2（主要单体萃取物）与HA（单体苯甲酸）的配分常数为KD，CuA_2=CKD,HA^2，其中C为各相似系列溶剂对应的一定常数。此外，还证明了在苯甲酸萃取铜（II）的过程中，现有的具有一定组成的混合溶剂优于氯仿。少

项目成果

Hiromichi YAMADA: "Solvent Effects on the Extraction of Copper(II)with Benzoic Acid" Anal. Sci.11. 715-721 (1995)

Hiromichi YAMADA：“溶剂对苯甲酸萃取铜 (II) 的影响”分析。

Hiromichi YAMADA: "Effects of Solvation on Partition and Dimerization of Benzoic Acid in Mixed Solvent Systems" Talanta. 42. 789-795 (1995)

Hiromichi YAMADA：“混合溶剂体系中溶剂化对苯甲酸分配和二聚的影响”Talanta。

Hiromichi YAMADA,Kyoko YAJIMA,Hiroko WADA,Genkichi NAKAGAWA :"Effects of Solvation on Partition and Dimerization of Benzoic Acid in Mixed Solvent Systems" Talanta. 42-6. 789-795 (1995)

Hiromichi YAMADA、Kyoko YAJIMA、Hiroko WADA、Genkichi NAKAGAWA：“混合溶剂体系中溶剂化对苯甲酸分配和二聚的影响”Talanta。

Hiromichi YAMADA: "Effects of Solvation on Partiton and Dimerization of Benzoic Acid in Solvaent Systems" Talanta. 42(in press). (1995)

Hiromichi YAMADA：“溶剂化对溶剂体系中苯甲酸的分配和二聚的影响”Talanta。

Hiromichi YAMADA: "Solvent Effects on the Extraction of Copper (II) with Benzoic Acid" Anal.Sci.11. 715-721 (1995)

Hiromichi YAMADA：“溶剂对苯甲酸萃取铜 (II) 的影响”Anal.Sci.11。