Method of separating lignocellulosic material into lignin, cellulose and dissolved sugars

Patent · Wed Dec 31 23:00:00 EST 1997

OSTI ID:871429

Black, Stuart K ^[1]; Hames, Bonnie R ^[2]; Myers, Michele D ^[3]

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1. Denver, CO
2. Westminster, CO
3. Dacono, CO

A method for separating lignocellulosic material into (a) lignin, (b) cellulose, and (c) hemicellulose and dissolved sugars. Wood or herbaceous biomass is digested at elevated temperature in a single-phase mixture of alcohol, water and a water-immiscible organic solvent (e.g., a ketone). After digestion, the amount of water or organic solvent is adjusted so that there is phase separation. The lignin is present in the organic solvent, the cellulose is present in a solid pulp phase, and the aqueous phase includes hemicellulose and any dissolved sugars.

• Research Organization: Midwest Research Institute
• DOE Contract Number: AC36-83CH10093
• Assignee: Midwest Research Institute (Kansas City, MO)
• Patent Number(s): US 5730837
• OSTI ID: 871429
• Country of Publication: United States
• Language: English

Related Subjects

/162/127/
adjusted
alcohol
amount
aqueous
aqueous phase
biomass
cellulose
cellulosic material
digested
digestion
dissolved
dissolved sugars
elevated
elevated temperature
hemicellulose
herbaceous
immiscible organic
ketone
lignin
lignocellulosic
lignocellulosic material
material
method
mixture
organic
organic solvent
phase
phase mixture
phase separation
pulp
separating
separating lignocellulosic
separation
single-phase
solid
solvent
sugars
temperature
water
water-immiscible
water-immiscible organic
wood