Method and apparatus for dewatering a mixture of ethanol and...

B - Operations – Transporting – 01 – D

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Details

B01D 61/36 (2006.01) B01D 1/28 (2006.01) C07C 29/76 (2006.01) C12P 7/06 (2006.01)

Patent

CA 2716624

The invention relates to a method and an apparatus for dewatering mixture of ethanol and water. The method com-prises steps for feeding mixture of ethanol and water (1) into an evaporator (2), evaporating said mixture of ethanol and water (1) and feeding a stream of vaporized mixture of ethanol and water (3) to a vapor recompression unit (4), pressurizing vaporized mix-ture of ethanol and water (3) in the vapor recompression unit (4) and feeding a stream of pressurized vaporized mixture of ethanol and water (5) to a membrane unit (6), and dividing said stream of pressurized mixture of ethanol and water (5) in to a stream of mixture of ethanol and water (8) and into a stream of dewatered mixture of ethanol and water (7).

L'invention concerne un procédé et un appareil pour la déshydratation d'un mélange d'éthanol et d'eau. Le procédé comprend les étapes d'alimentation d'un évaporateur (2) par un mélange d'éthanol et d'eau (1), l'évaporation dudit mélange d'éthanol et d'eau (1) et l'alimentation d'une unité de recompression de vapeur (4) par un courant de mélange vaporisé d'éthanol et d'eau (3), la pressurisation du mélange vaporisé d'éthanol et d'eau dans l'unité de recompression de vapeur (4) et l'alimentation par un courant de mélange vaporisé pressurisé d'éthanol et d'eau (5) d'une unité membranaire (6), et la division dudit courant de mélange pressurisé d'éthanol et d'eau (5) en un courant de mélange d'éthanol et d'eau (8) et en un courant de mélange déshydraté d'éthanol et d'eau (7).

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