Recovery of propylene and propylene oxide by selective separation with plural stage distillation,propylene oxide absorption and subsequent distillation

Abstract

Abstract PROPYLENE OXIDE AND PROPYLENE ARE SEPARATELY RECOVERED, IN A HIGH STATE OF PURITY, FRO A CRUDE PROPYLENE OXIDE, PRODUCED BY REACTION OF PROPYLENE WITH AN ORGANIC HYDROPEROXIDE, AND CONTAINING THE PROPYLENE OXIDE IN ADMIXTURE WITH UNCONVERTED PROPYLENE, WATER AND HIGHER BOILING OXYGEN-CONTAINING ORGANIC IMPURITIES, BY SUBJECTING THE CRUDE PROPYLENE OXIDE WO A TWO STAGE DISTILLATION, IN THE FIRST STAGE OF WHICH PROPYLENE IS TAKEN OVERHEAD UNDER CONTROLLED CONDITIONS RESULTING IN THE WILFULL RETENTION OF A SUBSTANTIAL AMOUNT OF THE PROPYLENE IN THE DISTILLATION BOTTOMS AND IN THE SECOND STAGE OF WHICH PROPRYLENE OXIDE IS TAKEN OVERHEAD IN ADMIXTURE WITH PROPYLENE, AND SEPARATING PROPYLENE OXIDE FROM THE SECOND STAGE DISTILLATION OVERHEAD BY SELECTIVE ABSORPTION IN AN AQUEOUS SOLVENT.

Inventors

• 👤 Sadok E Hoory
• 👤 Stanley F Newman
• 👤 Robert E Vincent

Bibliographic Details