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本发明涉及到从粗乙醇产品回收乙醇,乙醇是醋酸加氢反应得到的。采用粗乙醇分离和净化过程,允许回收无水乙醇。过程包括使用一台或多台萃取蒸馏塔分离粗乙醇产品,萃取塔应用一种或多种萃取剂。无水乙醇含水量小于1w%(以无水乙醇的总物质量为计算基础)。Johnston Victor J(US);etc.US2013035525
The present invention relates to the recovery of ethanol from a crude ethanol product obtained by the hydrogenation of acetic acid. The use of caustic ethanol separation and purification process, allowing the recovery of ethanol. The process involves the use of one or more extractive distillation columns to separate the caustic ethanol product and the extraction column with one or more extractants. Water content of anhydrous ethanol is less than 1w% (calculated on the basis of the total mass of anhydrous ethanol). Johnston Victor J (US); etc.US2013035525