Purification of alcohol

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 29/88 (2006.01)

Patent

CA 2515382

The invention provides a process for the purification of alcohols, particularly for the purification of isopropyl alcohol. A invention provides a process for reducing the amount of ultraviolet light absorbing ketone impurities and/or aldehyde impurities in a fluid mixture containing an alcohol in addition to ketone impurities and/or aldehyde impurities, which comprises reacting a fluid mixture containing an alcohol in addition to ketone impurities and/or aldehyde impurities, with a sufficient amount of a reducing agent, under conditions wherein the reducing agent is preferentially more reactive with the ketone impurities and/or aldehyde impurities than the alcohol to thereby form a reaction product; and then recovering a recovered alcohol product from the reaction product.

L'invention concerne un procédé de purification d'alcools, notamment la purification de l'alcool isopropylique. Elle concerne un procédé permettant de réduire la quantité d'impuretés cétoniques absorbant la lumière ultraviolette et/ou des impuretés d'aldéhydes dans un mélange fluidique contenant un alcool outre lesdites impuretés, qui consiste à faire réagir un mélange fluidique contenant un alcool outre les impuretés cétoniques et/ou d'aldéhydes, avec une quantité suffisante d'un réducteur, dans des conditions où ledit réducteur est de préférence plus réactif avec les impuretés cétoniques et/ou les impuretés d'aldéhydes qu'avec l'alcool de façon à former un produit de réaction ; et à récupérer un produit d'alcool extrait du produit de réaction.

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