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Regimes of extractive distillation in ethanol production

The influence of operating conditions to the effectiveness of extractive distillation process was investigated by using the method of gas chromatography. The experiment took place on an industrial vacuum plant of purification ethanol from impurities formed during fermentation. It is obtained that the concentration of different micro impurities at the selection zones depends on the temperature and the volumetric flow rate of extractive solvent. It gives us an opportunity to affect of ethanol purification from the various volatility impurities. Proposed method allows us to choose the extractive distillation regime that guarantees the necessary quality of ethanol. The values of operating conditions of extractive distillation for the best total purification from the attendant micro impurities are estimated.