Method of producing ethanol-water azeotrope from crude ethanol

Details Method of producing ethanol-water azeotrope from crude ethanol Method of producing ethanol-water azeotrope from crude ethanol

B - Operations, Transporting

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B01D 3/36 (2006.01) B01D 3/14 (2006.01) C07C 29/80 (2006.01) C07C 29/82 (2006.01) C07C 29/84 (2006.01)

Patent

CA 1142875

ABSTRACT OF THE DISCLOSURE This invention relates to a process for purifying crude ethanol, whether produced by fermentation or by the synthetic route, to produce a pure ethanol-water azeotrope. The process uses only two distillation columns for fermentation ethanol and only three columns for synthetic ethanol because the latter has diethyl ether as impurity. The inventive concept lies in the design and specification of the columns and the specific distillation conditions which enable each of the impurities in ethanol to be reduced below 1 ppm. Ethanol of such purity is most desirable when used for potable or pharmaceutical purposes.

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