METHOD FOR THE CONTINUOUS PURIFICATION BY DISTILLATION OF METHANOL, USED AS A SOLVENT IN THE SYNTHESIS OF PROPYLENE OXIDE WITHOUT COUPLING PRODUCTS, WITH THE SIMULTANEOUS ISOLATION OF THE METHOXY PROPANOLS.

摘要

The invention relates to a method for the continuous purification by distillation of methanol, used as a solvent in the synthesis of propylene oxide by the reaction of a hydroperoxide with propylene, with the simultaneous isolation of the methoxy propanols as an azeotropic mixture with water, in addition to the low and high boilers. Said method is characterised in that the solvent mixture that accumulates during the synthesis is separated in a dividing wall column.