Distillation method

C - Chemistry – Metallurgy – 12 – F

Patent

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C12F 5/00 (2006.01) B01D 3/14 (2006.01) B01D 9/04 (2006.01) C12G 3/12 (2006.01) C12G 3/14 (2006.01)

Patent

CA 2228908

A fusel oil is an alcohol or a mixture of alcohols having more than two, typically four or more, carbon atoms, whose presence in alcoholic solutions may be undesirable on account of its characteristic effect on taste and/or aroma. By reducing the temperature of alcoholic aqueous media containing fusel oil, the solubility of the fusel oil in the solution may be reduced, to the point where it no longer remains in solution. The fusel oil being lighter than aqueous alcohol, the medium separates into two phases, and the fusel oil phase may be removed. A better separation of fusel oil from the alcoholic aqueous phase is thus obtained than is possible through conventional dilution processes.

Une huile de fusel est un alcool ou un mélange d'alcools comptant plus de deux, généralement quatre ou plus, atomes de carbone, dont la présence dans des solutions à base d'alcool peut ne pas être souhaitable à cause de son effet caractéristique sur le goût et/ou sur l'arôme. En abaissant la température des milieux aqueux à base d'alcool contenant de l'huile de fusel, la solubilité de celle-ci dans la solution peut être abaissée jusqu'au point où elle ne reste plus en solution. L'huile de fusel étant plus légère que l'alcool aqueux, le milieu se sépare en deux phases, ce qui permet l'élimination de l'huile de fusel. On obtient ainsi une meilleure séparation de l'huile de fusel de la phase aqueuse à base d'alcool qu'il n'est possible par les procédés classiques de dilution.

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