Distillation: processes – separatory – Distilling to separate or remove only water – From organic compound
Patent
1982-10-27
1985-09-17
Sever, Frank
Distillation: processes, separatory
Distilling to separate or remove only water
From organic compound
44 53, 44 56, 203 39, 203 69, 203DIG13, 568916, B01D 334
Patent
active
045418977
ABSTRACT:
A distillation process 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 entrainers, 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 entrainers, 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.
REFERENCES:
patent: 2194851 (1940-03-01), Guinot
Brucker Rainer
Heitmann Wilhelm
Sommer August
Wozny Norbert
Chemische Werke Huls Aktiengesellschaft
Sever Frank
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