Two-stage dilute acid prehydrolysis of biomass
Patent
·
OSTI ID:7076274
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):
- A; US 5125977
- Application Number:
- PPN: US 7-681299
- OSTI ID:
- 7076274
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
09 BIOMASS FUELS
090900* -- Biomass Fuels-- Processing-- (1990-)
ALDEHYDES
BIOMASS
CARBOHYDRATES
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
DECOMPOSITION
DILUTION
ENERGY SOURCES
HEMICELLULOSE
HYDROLYSIS
LYSIS
MATERIALS
MONOSACCHARIDES
ORGANIC COMPOUNDS
PENTOSES
POLYSACCHARIDES
RAW MATERIALS
REMOVAL
RENEWABLE ENERGY SOURCES
SACCHARIDES
SOLVOLYSIS
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
XYLANS
XYLOSE
090900* -- Biomass Fuels-- Processing-- (1990-)
ALDEHYDES
BIOMASS
CARBOHYDRATES
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
DECOMPOSITION
DILUTION
ENERGY SOURCES
HEMICELLULOSE
HYDROLYSIS
LYSIS
MATERIALS
MONOSACCHARIDES
ORGANIC COMPOUNDS
PENTOSES
POLYSACCHARIDES
RAW MATERIALS
REMOVAL
RENEWABLE ENERGY SOURCES
SACCHARIDES
SOLVOLYSIS
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
XYLANS
XYLOSE