A process for continuously operated purification by distillation under reduced pressure result of the in the case of the coupler - product-free propylene oxide synthesis solvent used of methanol with simultaneous separation of the methoxy propanol and the high boilers

摘要

A process for continuously operated purification by distillation under reduced pressure result of the in the case of the propylene oxide synthesis by reacting a hydroperoxide with propylene used as solvent methanol under simultaneous separation of the methoxy propanols, characterized in that the in the case of the synthesis of the solvent mixture obtained in a dividing wall column into a low-boiling fraction, the methanol, in a by means of was fractions, which are the methoxy propanols as an azeotrope with water, and a high-boiling fraction, the water and propylene glycol, is separated.