KETONE AND/OR ALCOHOL PRODUCTION METHOD, AND SYSTEM FOR SAME

Provided is a method in which a hydroperoxide is decomposed quickly and with high selectivity using an alkaline aqueous solution and the alkali is recovered and recycled, thereby producing the corresponding target ketone and/or alcohol at a low cost. Also provided is a system for the same. This production method includes: a neutralization step in which an oxidation reaction liquid is brought intocontact with a first alkaline liquid comprising a carbonate of an alkali metal, whereby at least a portion of carboxylic acid in the oxidation reaction liquid is neutralized, and the reaction system is divided into a first oil phase and a first water phase; a saponification step in which the first oil phase is brought into contact with a second alkaline liquid having a higher pH than the first alkaline liquid, whereby the hydroperoxide and esterified compound in the first oil phase are decomposed, and the reaction system is divided into a second oil phase and a second water phase; and an alkali recovery step in which