PRODUCTION METHOD OF POLYETHER POLYOL BY HYDROLYZING ALKYLENE OXIDE TO FORM ALKYLENE GLYCOL AND SUBS

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In synthesizing polyether polyol, not using alkylene glycol as raw material but using water as raw material, energy necessary in a purification process of alkylene glycol, and waste are eliminated, thereby contributing to environmental improvement of the earth. Provided is a production method of polyol, where alkylene oxide is subjected to hydrolysis reaction with an acid catalyst, and an alkali metal hydroxide catalyst is added into the reaction mixed liquid to undergo addition of alkylene oxide appropriately.