Process for producing fuel grade ethanol by continuous fermentation, solvent extraction and alcohol separation
Patent
·
OSTI ID:865456
- Marietta, GA
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 Corporation (Atlanta, GA)
- Patent Number(s):
- US 4517298
- Application Number:
- 06/534,262
- OSTI ID:
- 865456
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/435/44/999/
alcohol
alcohol-organic
aqueous
biomass
comprising
containing
continuous
continuous fermentation
continuously
ethanol
extract
extract phase
extractant
extracting
extraction
feedstock
fermentable
fermentation
fermenting
forming
free
fuel
grade
liquor
liquor containing
microorganisms
organic
organic solvent
phase
portion
prepared
process
producing
producing fuel
raffinate
returned
separated
separation
solvent
solvent extract
solvent extraction
solvent phase
substantially
substantially free
unextracted
unit
water
alcohol
alcohol-organic
aqueous
biomass
comprising
containing
continuous
continuous fermentation
continuously
ethanol
extract
extract phase
extractant
extracting
extraction
feedstock
fermentable
fermentation
fermenting
forming
free
fuel
grade
liquor
liquor containing
microorganisms
organic
organic solvent
phase
portion
prepared
process
producing
producing fuel
raffinate
returned
separated
separation
solvent
solvent extract
solvent extraction
solvent phase
substantially
substantially free
unextracted
unit
water