Two-stage dilute acid prehydrolysis of biomass

Patent · Wed Jan 01 00:00:00 EST 1992

OSTI ID:868366

Grohmann, Karel ^[1]; Torget, Robert W ^[2]

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1. Winter Haven, FL
2. Littleton, CO

A two-stage dilute acid prehydrolysis process on xylan containing hemicellulose in biomass is effected by: treating 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 to xylose; removing said xylose from said fast hydrolyzable xylan and leaving a residue; and treating said residue having a slow hydrolyzable xylan with a dilute acid under predetermined high temperature conditions for a residence time required to hydrolyze said slow hydrolyzable xylan to xylose.

• Research Organization: Midwest Research Institute, Kansas City, MO (United States)
• DOE Contract Number: AC02-83CH10093
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5125977
• OSTI ID: 868366
• Country of Publication: United States
• Language: English

Related Subjects

two-stage
dilute
acid
prehydrolysis
biomass
process
xylan
containing
hemicellulose
effected
treating
feedstock
hemicellulosic
material
comprising
slow
hydrolyzable
fast
predetermined
temperature
conditions
residence
time
sufficient
hydrolyze
xylose
removing
leaving
residue
required
cellulosic material
time required
temperature conditions
residence time
material comprising
time sufficient
dilute acid
hydrolysis process
two-stage dilute
acid prehydrolysis
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