Estimation of extraction behavior of Co(II) and Ni(II) by McCabe-Thiele analysis

Industrial solvent extraction for the purpose of separation and recovery of the metal ions has been carried out in the countercurrent multistage process. the determination of the operating conditions is performed by mccabe-thiele analysis for the equilibrium extraction isotherm obtained in extraction experiments. in such an analysis,it is possible to analyze the condition of the extraction of metal ions. for example,however,in the case of mixed solution of co(ii) and ni(ii),the analysis is very complicated. this is because under the conditions where the extraction of co(ii) takes place,the stripping of ni(ii) happens at the same time. in considering the separation of the metal ions in the multicomponent system,it is better to establish the analytical method to provide an important guideline for actual operation. in this study,the conditions where co(ii) is extracted and ni(ii) is stripped are considered. the extraction behavior of co(ii) and stripping behavior of ni(ii) could be estimated from the extraction isotherms. from the estimated results of each metal ion,the separation performance of each metal ion is evaluated by using purity as an indicator. by varying the phase ratio and stage number,the extraction and stripping behavior of the respective metal ions could be reasonably estimated © school of engineering,taylor’s university.