Process of concentrating ethanol from dilute aqueous solutions t

Details Process of concentrating ethanol from dilute aqueous solutions t Process of concentrating ethanol from dilute aqueous solutions t

1980-06-24

1981-07-07

Evans, Joseph E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568917, C07C 3108, C07C 2976

Patent

active

042776350

ABSTRACT:
Relatively dilute aqueous solutions of ethanol are concentrated by passage through a bed of a crystalline silica polymorph, such as silicalite, to adsorb the ethanol with residual dilute feed in contact with the bed, which is displaced by passing concentrated aqueous ethanol through the bed without displacing the adsorbed ethanol. A product concentrate is then obtained by removing the adsorbed ethanol from the bed together with at least a portion of the concentrated aqueous ethanol used as the displacer liquid. This process permits ethanol to be concentrated from dilute fermentation beers, which may contain from 6 to 10% ethanol, to obtain a concentrate product at very low energy cost having an ethanol concentration in excess of 95%, such as a concentration of from 98 to 99.5%.

REFERENCES:
patent: 1985204 (1934-12-01), Dern et al.
patent: 1985205 (1934-12-01), Derr
patent: 2564717 (1951-08-01), Olsen
patent: 2619497 (1952-11-01), Hockberger
patent: 3485879 (1969-12-01), Mameniskis et al.
patent: 4061724 (1977-12-01), Grose et al.
patent: 4073865 (1978-02-01), Flanigen et al.
Flanigen et al., "Nature", vol. 271, 9 Feb. 1978, pp. 512-516.

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