610. ELIOT. T. Q., GODDIN, C. S., AND WEAVER, J. C. (Stanolind Oil & Gas Co.). Extractive Distillation of Oxygenated Organic Compounds. United States Patent 2,607,719, Aug. 19, 1952; appl. filed Apr. 15, 1949. Serial No. 87,698; 7 claims (Cl. 202-39.5

Patent Abstracts

610. ELIOT. T. Q., GODDIN, C. S., AND WEAVER, J. C. (Stanolind Oil & Gas Co.). Extractive Distillation of Oxygenated Organic Compounds. United States Patent 2,607,719, Aug. 19, 1952; appl. filed Apr. 15, 1949. Serial No. 87,698; 7 claims (Cl. 202-39.5). Chem. Abs., vol. 47, 1953, p. 5422.

Crude and complex organic mixtures obtained by the hydrocarbon synthesis process, involving the reduction of CO with H₂ in the presence of a fluidized Fe catalyst, can be separated and recovered in substantially pure form by being subjected to a series of extractive distillations with H₂O. The method relates particularly to the separation of ethanol, ispropanol, methyl-ethyl ketone, methyl-propyl ketone, butyraldehyde, and ethyl acetate. The concentration of H₂O in the column ranges 90-99 mol. %. The heat requirements are 80-120 B.T.U. per lb. of bottoms to give a bottom tower temperature of 68º-77º. By using only H₂O as an extractive distillation agent, sharp separations can be made between the several constituents, which not only boil very close together but form numerous azeotropes.