Isolation of levoglucosan from pyrolysis oil derived from cellulose
- Lakewood, CO
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.
- Research Organization:
- Midwest Research Institute, Kansas City, MO (United States)
- DOE Contract Number:
- AC02-83CH10093
- Assignee:
- Midwest Research Institute (Kansas City, MO)
- Patent Number(s):
- US 5371212
- OSTI ID:
- 869636
- Country of Publication:
- United States
- Language:
- English
Praktische darstellung von 1,6-anhydro-β-d-glucopyranose durch vakuumpyrolyse von Stärke. Kriterien für den bau eines stahlreaktors
|
journal | March 1988 |
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Isolation of levoglucosan from lignocellulosic pyrolysis oil derived from wood or waste newsprint
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Related Subjects
levoglucosan
pyrolysis
oil
derived
cellulose
purity
obtained
mixing
water
basic
metal
hydroxide
oxide
salt
amount
sufficient
elevate
ph
values
range
12
adding
excess
obtain
colored
materials
impurities
removed
slurry
formed
drying
azeotropically
methyl
isobutyl
ketone
solvent
form
residue
evaporation
reducing
powder
continuously
extracting
ethyl
acetate
provide
levoglucosan-rich
extract
concentrating
removing
crystalline
preferably
oh
added
adjust
elevated
ph range
pyrolysis oil
amount sufficient
metal hydroxide
ph value
ethyl acetate
ph values
basic metal
isobutyl ketone
oil derived
methyl isobutyl
purity levoglucosan
excess amount
/999/