Process for producing fuel grade ethanol by continuous fermentat

Details Process for producing fuel grade ethanol by continuous fermentat Process for producing fuel grade ethanol by continuous fermentat

1983-09-21

1985-05-14

Yoncoskie, Robert

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing oxygen-containing organic compound

435161, 435162, 435165, 435813, 44 53, 44 56, C12P 716, C12P 706, C10L 102

Patent

active

045172986

ABSTRACT:
Alcohol substantially free of water is prepared by continuously fermenting a fermentable biomass feedstock in a fermentation unit, thereby forming an aqueous fermentation liquor containing alcohol and microorganisms. Continuously extracting a portion of alcohol from said fermentation liquor with an organic solvent system containing an extractant for said alcohol, thereby forming an alcohol-organic solvent extract phase and an aqueous raffinate. Said alcohol is separated from said alcohol-organic solvent phase. A raffinate comprising microorganisms and unextracted alcohol is returned to the fermentation unit.

REFERENCES:
patent: 4094742 (1978-06-01), Bellamy
patent: 4242455 (1980-12-01), Muller et al.
patent: 4251231 (1981-02-01), Baird
patent: 4306884 (1981-12-01), Roth

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