Process for extracting ethanol from fermentation broths for dire

Details Process for extracting ethanol from fermentation broths for dire Process for extracting ethanol from fermentation broths for dire

1990-06-13

1992-05-05

Medley, Margaret B.

Fuel and related compositions

Liquid fuels

Organic oxygen compound containing

203 44, 435161, 568913, C10L 102

Patent

active

051103192

ABSTRACT:
A method of producing ethanol from a fermentation source for direct blending into gasoline to form gasohol is provided by extracting ethanol from the fermentation broth with a non-toxic solvent compatible with gasoline. The invention includes extraction outside of the fermentor and the recycling of the extracted broth back to the fermentor. An extracting column is used for the extraction and recycling and the extract can be dried before blending it with the gasoline. The preferred solvent is an alkylate.

REFERENCES:
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patent: 4251231 (1981-02-01), Baird
patent: 4297172 (1981-10-01), Kyle
patent: 4402792 (1983-09-01), Horst
patent: 4425137 (1984-01-01), Roth
patent: 4441891 (1984-04-01), Roth
patent: 4517298 (1985-05-01), Tedder
D. Tedder, "Continuous Fermentation and Product Recovery by Liquid-Liquid Extraction", Biotech 84 USA pp. A177-A188.
Minier and Goma, "Ethanol Production by Extractive Fermentation" Biotechnology and Bioengineering, vol. XXIV, pp. 1565-1579 (1982).
Crabbe et al., "Effective Microorganisms on Rate of Liquid Extraction of Ethanol From Fermentation Broths", Biotechnology and Bioengineering, vol. XXVIII, pp. 939-943. (1986).
Kollerup and Daugulis, "Screening and Identification of Extractive Fermentative Solvents Using a Data Base", Can. J. Chem. Eng. (63) 919 (1985).

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