BIOREFINING APPLICATION NOTE 9.01.02 BIOETHANOL PURIFICATION www.kpatents.com ETHANOL (C 2 H 5 OH) Typical end products Bioethanol fuel (ethyl alcohol) additive for gasoline Chemical curve: Ethanol R.I. per Conc% b.w. at Ref. Temp. of 20°C Introduction Following fermentation, further ethanol concentration is required. This is achieved through distillation and by using molecular sieve columns. Once the ethanol is

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