Process for producing fuel grade ethanol by continuous fermentation, solvent extraction and alcohol separation

Patent · Tue May 14 00:00:00 EDT 1985

OSTI ID:6317148

Tedder, D W

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.

• Assignee: Georgia Tech. Research Corp.
• Patent Number(s): US 4517298
• OSTI ID: 6317148
• Country of Publication: United States
• Language: English

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ALCOHOLS
BIOCONVERSION
BIOMASS
ENERGY SOURCES
ETHANOL
EXTRACTION
FERMENTATION
HYDROXY COMPOUNDS
MICROORGANISMS
ORGANIC COMPOUNDS
PRODUCTION
RENEWABLE ENERGY SOURCES
SEPARATION PROCESSES
SOLVENT EXTRACTION