Two-stage dilute acid prehydrolysis of biomass

Patent · Tue Jun 30 00:00:00 EDT 1992

OSTI ID:7076274

Grohmann, K; Torget, R W

This patent describes a two-stage dilute acid prehydrolysis process on xylan containing hemicellulose in biomass. It comprises treating a feedstock of hemicellulosic material comprising xylan that is slow hydrolyzable and xylan that is fast hydrolyzable under predetermined low temperature conditions with a dilute acid for a residence time sufficient to hydrolyze the fast hydrolyzable xylan at temperatures between about 90 to about 180{degrees} C to xylose; removing the xylose from the fast hydrolyzable xylan and leaving a residue having slow hydrolyzable xylan; treating the residue having slow hydrolyzable xylan with a dilute acid under predetermined higher temperature conditions for a residence time sufficient to hydrolyze the slow hydroyzable xylan.

• Assignee: US Dept. of Energy, Washington, DC (United States)
• Patent Number(s): US 5125977; A
• Application Number: PPN: US 7-681299
• OSTI ID: 7076274
• Resource Relation: Patent File Date: 8 Apr 1991
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
BIOMASS
HEMICELLULOSE
HYDROLYSIS
XYLANS
CHEMICAL FEEDSTOCKS
DILUTION
REMOVAL
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
XYLOSE
ALDEHYDES
CARBOHYDRATES
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
LYSIS
MATERIALS
MONOSACCHARIDES
ORGANIC COMPOUNDS
PENTOSES
POLYSACCHARIDES
RAW MATERIALS
RENEWABLE ENERGY SOURCES
SACCHARIDES
SOLVOLYSIS
TEMPERATURE RANGE
090900* - Biomass Fuels- Processing- (1990-)