本发明是净化和/或回收醋酸加氢反应得到的粗乙醇产品中的乙醇。粗乙醇的分离净化过程可以应用于回收乙醇和去除杂质。具体说:在乙醛去除塔中分离轻组分,其操作压力大于大气压,以便回收可 The present invention is to purify and / or recover ethanol in a crude ethanol product obtained by hydrogenation of acetic acid. Separation and purification of caustic ethanol can be applied to the recovery of ethanol and the removal of impurities. Specifically, the light components are separated in the acetaldehyde removal column and the operating pressure is greater than atmospheric pressure for recovery