Experimental Design in Solvent Extraction: A Study for Divalent Metals Separation in D2EHPA/Isoparaffin System

Abstract

The solvent extraction process combined with tools of experimental design assists in developing procedures for separation and purification of elements or mineral compounds with high purity. In this work the technique was used to replace the traditional methods for the collection of basic information required for the development of a circuit of solvent extraction. According to the literature, several factors may influence the extraction of divalent metals by D2EHPA in sulfate media, among which the concentration of metals in solution. The objective was to study the variables affecting the separation process Mn/Ni/Co/Cu, such as the aqueous/organic (A/O), contact time, concentrations of the divalent metals in sulfuric medium, pH and solvent concentration. An investigation into the variables that control the process was done using a “cube + star” experimental design, with central point. The results demonstrate it is possible to obtain of a satisfactory mathematical model that describes the process

Tailored synthesis of iron oxide nanoparticles for specific applications using a statistical experimental design

“…The BBD constitutes a rotating spherical response surface that features a center point, as well as midpoints between the corners, all of which are circumscribed on a sphere. This design, determined by the process requirements, can optimize multiple chemical and physical processes with a suitable number of experiments [ [17] , [18] , [19] , [20] ].…”