Method of purifying propylene oxide

Details Method of purifying propylene oxide Method of purifying propylene oxide

2007-10-23

2007-10-23

Manoharan, Virginia (Department: 1764)

Distillation: processes, separatory

With measuring, testing or inspecting

Of concentration

C203S068000, C203S098000, C203S064000, C549S541000

Reexamination Certificate

active

10504548

ABSTRACT:
A process for purifying propylene oxide characterized by subjecting a liquid reaction mixture containing propylene oxide, and water, hydrocarbons and oxygen-containing organic compounds as impurities obtained by reacting cumene hydroperoxide with propylene to extractive distillation using an extractant of a hydrocarbon having 7 to 20 carbon atoms with an extractive distillation column, and controlling a concentration of propylene glycol in the extractant supplied to the extractive distillation column to 20% by weight or less.

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