Pervaporation of dichloromethane from multicomponent aqueous systems containing n-butanol and sodium chloride

In this paper, pervaporation (PV) of dichloromethane (DCM) from binary and multicomponent systems at different feed concentrations and temperatures using a commercial hydrophobic membrane CMX-GF-010-D (CELFA AG, Switzerland) is reported. Coupling effects are studied by permeating DCM/n-butanol/water ternary mixtures. The effect of sodium chloride on the process performance is also evaluated by PV of ternary DCM/sodium chloride/water and quaternary DCM/n-butanol/sodium chloride/water mixtures. PV performance was evaluated by permeate flux and enrichment factor. Further, permeance was calculated for pure water, DCM/water and DCM/n-butanol/water systems at 40 °C.