Extraction of Naphthalene from an Organic Phase with the Mixture DMSO-methanol-phenol in Batch Mode. Application of a Composite Centered Design (CCD)☆

Abstract The aim of this study was to improve the extraction efficiency of naphthalene from an organic phase (fuel oil) which had given already an extraction yield of about 79% using the mixture phenol-methanol as extractant. To perform this yield several extractions of naphthalene using binary and tertiary mixtures of products were proceeded. It was found that after an optimization by a mixture design, the DMSO-methanol-phenol composition used to extract naphthalene was efficiency. To study the extraction phenomena of naphthalene with the extractant mixture, a second degree experimental design called composite centered design had been used. In this paper an extraction of naphthalene from an organic phase (fuel oil) using the mixture DMSO-methanol-phenol was carried out by varying the temperature, the ratio R (Fuel/Mixture) and the initial concentration of naphthalene. After analysis of variance ANOVA, effects of parameters were studied and a model correspondent to the extraction according parameters was then applied. The optimization of these parameters showed that the extraction yield of naphthalene was almost perfect yielding 98.88%.