Isolation of levoglucosan from pyrolysis oil derived from cellulose

Patent · Tue Dec 06 00:00:00 EST 1994

OSTI ID:6892491

Moens, L

High purity levoglucosan is obtained from pyrolysis oil derived from cellulose by: mixing pyrolysis oil with water and a basic metal hydroxide, oxide, or salt in amount sufficient to elevate pH values to a range of from about 12 to about 12.5, and adding an amount of the hydroxide, oxide, or salt in excess of the amount needed to obtain the pH range until colored materials of impurities from the oil are removed and a slurry is formed; drying the slurry azeotropically with methyl isobutyl ketone solvent to form a residue, and further drying the residue by evaporation; reducing the residue into a powder; continuously extracting the powder residue with ethyl acetate to provide a levoglucosan-rich extract; and concentrating the extract by removing ethyl acetate to provide crystalline levoglucosan. Preferably, Ca(OH)[sub 2] is added to adjust the pH to the elevated values, and then Ca(OH)[sub 2] is added in an excess amount needed. 3 figures.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States); Midwest Research Institute, Kansas City, MO (United States)
• DOE Contract Number: AC02-83CH10093
• Assignee: Midwest Research Institute, Kansas City, MO (United States)
• Patent Number(s): US 5371212; A
• Application Number: PPN: US 7-940849
• OSTI ID: 6892491
• Resource Relation: Patent File Date: 4 Sep 1992
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
CELLULOSE
PYROLYSIS
PROTEINS
SYNTHESIS
CHEMICAL COMPOSITION
PYROLYTIC OILS
SEPARATION PROCESSES
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
FUELS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
POLYSACCHARIDES
PYROLYSIS PRODUCTS
SACCHARIDES
SYNTHETIC FUELS
THERMOCHEMICAL PROCESSES
090900* - Biomass Fuels- Processing- (1990-)
099000 - Biomass Fuels- Products & By-Products- (1990-)