| 摘要 |
Water soluble oxygenated hydrocarbons produced by microbial fermentation, e.g., ethanol, butanol, acetone, etc., are conveniently and economically recovered with a minimum expenditure of energy by passing heated by-product carbon dioxide gas through at least a portion of the fermentation medium to simultaneously vaporize and carry off oxygenated hydrocarbon fermentation product dissolved therein and reduce the temperature of the fermentation medium to a level conducive to maximum oxygenated hydrocarbon production. The vaporized oxygenated hydrocarbon fermentation product is separated from the carbon dioxide gas in a scrubbing unit and the resulting aqueous solution of product is concentrated, if desired, by distillation.
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