Two-stage dilute acid prehydrolysis of biomass

Details Two-stage dilute acid prehydrolysis of biomass Two-stage dilute acid prehydrolysis of biomass

C - Chemistry, Metallurgy

13

K

C13K 13/00 (2006.01)

Patent

CA 2065548

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.

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