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

为了研究混合溶液对金属溶液提取的影响，选择了由铜（II），苯甲酸和1-二氯酸苯甲酸或2-辛烷苯甲酮混合溶液组成的溶液提取系统。在分析用提取剂对金属离子提取的提取均衡时，必不可少的信息必须具有有关提取剂分配的信息。苯甲酸的分配和二聚化常数已在1-辛醇苯苯和2-辛酮苯苯混合溶液系统中确定。单体苯甲酸的分区常数增加以及在有机相中酸的尺寸降低的降低被定量地解释了一个1-二氨酰或2-辛酸分子的单体苯甲酸求解。但是，在1-二氯苯基混合溶液的较高1-二氯醇区域中，发现分区和二聚化常数是我的……比我比通过一个1-二二酚分子求解单体酸所预测的二氯化溶液要小。这归因于单体苯甲酸的水分，因为在混合溶液中增加了水的浓度，而在混合溶液中增加了1-辛醇的含量，并使用相同的1-辛醇 - 苯甲醇和2-辛酸 - 苯酮 - 苯酮 - 苯酮混合解决方案与多种混合率，与苯甲酸分析的分析（II分类）（甲酸盐）的分析（II），该溶液（benzoicial equient）（II）分类（II分类） 执行。发现单体和二聚体铜（II）苯甲酸酯是每个提取系统的原因。在目前的混合溶液系统中，发现CUA_2（主要单体提取物种）的分区常数与HA（单体苯甲酸）之间存在以下关系：Kd，Cua_2 = CKD，HA^2，C是与每个类似的解决方案相对应的一定常数。此外，已经证明，具有一定成分的当前混合溶液在用苯甲酸提取铜（II）中优于氯仿。较少的

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: "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,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: "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。