Abstract

This study measures the quaternary salt concentration in a dichloromethane (or chlorobenzene)/alkaline solution and determines the thermodynamic equilibrium data. The true extraction constant, distribution coefficient, dissociation constant in the aqueous phase and free energies of the true extraction constant, distribution coefficient and dissociation constant are obtained as well. The distribution coefficient increased and the real dissociation constant decreased with increasing NaOH concentration. The hydroxide ion concentration and the water content in the organic phase attain a maximum value when the NaOH concentration is around 6 M.

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