PURPOSE: To make it possible to miniaturize a production device because of causing no concentration of percarboxylic acid and directly, economically and efficiently obtain the title compound having high safeness, by reacting propylene with H2O2 in the presence of an organic carboxylic acid using a specific reaction tower and solvent.
CONSTITUTION: A multistage reaction tower is used as a reaction tower and a solvent such as 1,2-dichloroethane or 1,2-dichloropropane capable of forming a heterogeneous azeotropic mixture with water and simultaneously being inert to H2O2 and propylene oxide as a solvent and an organic monocarboxylic acid such as acetic acid, propionic acid or lactic acid and orthoborate, etc., as an acid catalyst are charged and bottom liquid of the reaction tower is circulated to upper part of a reactor and H2O2 is fed from a circulating feed part of the bottom liquid of reaction tower to the lower part and propylene is fed from the reaction tower bottom and water introduced into the reaction tower and water produced by reaction are continuously taken out from the upper part of the reaction tower together with the above-mentioned solvent and the resultant propylene oxide to provide the propylene oxide.
WATANABE KEISUKE
MASUDA TAKAYOSHI
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