Recovery of butanol from a mixture of butanol, water, and an organic extractant

摘要

A process for recovering butanol from a mixture comprising water-immiscible organic extractant, water, butanol, ethanol, volatile fermentation byproducts and optionally a non-condensable gas, is provided. The butanol is selected from 1-butanol, 2-butanol, isobutanol, and mixtures thereof. The extractant comprises at least one solvent selected form the group consisting of C7 to C22 fatty alcohols, C7 to C22 fatty acids, esters of C7 to C22 fatty aldehydes, and mixtures thereof.