SEPARATION OF INORGANIC SALTS FROM DIMETHYL SULFOXIDE

摘要

A process for separating inorganic salts from a solution of dimethyl sulfoxide (DMSO) water and salts comprises feeding the solution plus a hydrocarb on based oil to a vacuum thin film evaporator. The DMSO and water are vaporized and condensed outside the evaporator for reuse or further purification. The salt and oil exit the evaporator as a liquid phase slurry. Water is added to the slurry to dissolv e the salt and produce an aqueous phase and an oil phase which are separated. The oil phase is recycled to the thin film evaporator portion of the process.