仲辛基苯氧乙酸萃取Cu(Ⅱ)的性能研究

Extraction Performance of Cu(Ⅱ)with Sec-Octylphenoxy Acetic Acid

采用溶剂萃取法 ,研究了新型萃取剂——仲辛基苯氧乙酸 (CA- 12 )从盐酸介质中萃取Cu( )的性能。考察了萃取温度、平衡水相酸度、萃取剂初始浓度、氯离子浓度、铜离子浓度对萃取的影响。实验结果表明 :分配比随平衡水相酸度的增加、萃取剂初始浓度的减小而减小 ;水相中氯离子、铜离子 ( )初始浓度对分配比均有明显的影响 ;仲辛基苯氧乙酸从盐酸介质中萃取 Cu( )的过程为吸热过程 ,并计算得到其过程热 Δ H=12 .77k J/

The extraction performance of Cu(Ⅱ) with a new kind of extractant,ammonized sec octylphenoxy acetic acid(CA-12),from HCl medium was studied.The influence of extraction temperature,aqueous equilibrium acidity,the original concentration of extractant,Cl - and Cu 2+ on extraction was also tested.The results indicated that the distribution ratio was reduced with aqueous equilibrium acidity increased,the extractant original concentration reduced and extraction temperature reduced.The influence of both Cl - and Cu 2+ original concentration in aqueous phase on distribution ratio was also obvious.The thermodynamic function value ΔH of the process was calculated as 12.77kJ/mol.