C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
202/64
C07C 29/82 (2006.01) B01D 3/00 (2006.01) B01D 3/14 (2006.01)
Patent
CA 1197208
ABSTRACT OF THE DISCLOSURE A distillation proces for the production of dehydrated ethanol from dilute aqueous solutions of ethanol characterized in that the distillation is performed in a two-column system wherein the first column--for rectification--is operated under such a pressure that the second column--for dehydration--is heated exclusively with the vapors of the first column; in the first column the concentration of the dilute aqueous ethanol is effected to an ethanol concentration below the composition of the binary ethanol-water azeotrope; the separation of water is effected from the lower layer of the condensed head product of the second column; the separation of impurities and drag agents, having a lower boiling point than ethanol, is effected at the head of the first column and that of impurities, having a higher boiling point, above the feed point of the dilute aqueous solution in the first column; and, in the second column, the dehydration is effected by means of drag agents, with the addition of a fuel component or fuel, to which the ethanol is to be added, if required, while separating the aqueous phase as a head product.
414279
Brucker Rainer
Heitmann Wilhelm
Sommer August
Wozny Norbert
Borden Ladner Gervais Llp
Degussa-Huls Aktiengesellschaft
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