Method for reducing content of ethyl acetate in recovered ethanol

The invention discloses a method for reducing the content of ethyl acetate in recovered ethanol, which comprises the following steps of: passing a mixed solution of recovered ethanol and ethyl acetate through a filtering device, conveying the mixed solution of ethanol and ethyl acetate to a rectifying tower, feeding from the middle section of a tower kettle of the rectifying tower, feeding an ionic liquid as an extracting agent from the top of the rectifying tower, a reflux ratio is set for rectification, ethyl acetate is recovered from the top of the rectification tower, an ethanol and ionic liquid mixture enters a recovery tower from the bottom of the rectification tower, and high-purity ethanol is obtained from the top of the recovery tower; sodium hydroxide is added into the treated ethanol liquid, so that the pH value of the mixed liquid is reached, and residual ethyl acetate is degraded; the mixed solution is rectified, the temperature and the reflux ratio are set, ethyl alcohol is evaporated out, pure