Abstract: Studies on the kinetics of extracting copper from chloride medium (CuCl2-NaCl-HCl)with HS-LIX65N(Escaid 100 as the diluent)in a Lewis cell was carried out. In this article, the effect of the different compositions of the two phases on the extraction rate of copper was studied. Considering that the controlling regime of copper extraction in such a system was the interfacial chemical reaction related with adsorption and de-sorption, our experimental results indicated that the formation of 1 - 2 complex (i. e., CuR2), was the controlling reaction step, and species of CuCl+ were the main extracted species under the experimental conditions employed. Theoretical analysis led to the development of the following model: where, [RH]i - concentration of species at the interface; a- The activity of species in the bulk phase. The average deviation of computed results from experimental data were found to be 5.29% only.

摘要： 采用HS-LIX65N为萃取剂(稀释剂为Escaid 100)进行了从氯化物(CuCl_2-NaCl-HCl)介质中萃取铜的动力学研究.实验在一恒界面池(Lewis cell)中进行,本文着重研究了不同的两相组成对铜的萃取传质速率的影响.在判定HS-LIX65N从氯化物介质中萃取铜的控制机制为带有吸附和解吸过程的界面化学反应的基础上,确定了铜的1-2络合物(即CuR_2)的生成为反应控制步骤;而且实验结果表明,在一定的实验条件下,CuCl+是主要的被萃取组分.在理论分析的基础上,建立了如下萃取动力学模型:N_(cu)=[RH]i/a_(H~+)[1.791×10~(-5)(a_(cu~(2+))+1.882×10~(-4)(a_(CuCl~+)]用此模型计算所得结果与实验结果的平均偏差为5.29%.