Process for purifying propylene oxide
AssigneeSumitomo Chemical Company, Limited
InventorsNoriaki Oku, Masaru Ishino
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Abstract
A process is described for purifying propylene oxide, which includes the step of distilling propylene oxide containing impurities in the presence of a hydrocarbon having 5 carbon atoms or less. According to the present invention, a process is provided for purifying propylene oxide which has a feature that impurities contained in a solution containing propylene oxide to be purified can be efficiently removed. Oxygen-containing impurities, in particular, can be very efficiently removed.
Claims3
A process for purifying propylene oxide, which consists essentially of distilling propylene oxide containing 50 ppm by weight to 5% by weight of oxygen-containing impurities in total in the presence of a hydrocarbon having 5 carbon atoms or less using a distillation column, discharging the oxygen-containing impurities together with the hydrocarbon from the top of the column, and recovering purified propylene oxide from the bottom of the column.
Dependencies are inferred from the claim text.