Dilute acid/metal salt hydrolysis of lignocellulosics

Patent · Tue Jan 01 00:00:00 EST 2002

OSTI ID:874609

Nguyen, Quang A ^[1]; Tucker, Melvin P ^[2]

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1. Golden, CO
2. Lakewood, CO

A modified dilute acid method of hydrolyzing the cellulose and hemicellulose in lignocellulosic material under conditions to obtain higher overall fermentable sugar yields than is obtainable using dilute acid alone, comprising: impregnating a lignocellulosic feedstock with a mixture of an amount of aqueous solution of a dilute acid catalyst and a metal salt catalyst sufficient to provide higher overall fermentable sugar yields than is obtainable when hydrolyzing with dilute acid alone; loading the impregnated lignocellulosic feedstock into a reactor and heating for a sufficient period of time to hydrolyze substantially all of the hemicellulose and greater than 45% of the cellulose to water soluble sugars; and recovering the water soluble sugars.

• Research Organization: Midwest Research Institute, Kansas City, MO (United States)
• DOE Contract Number: AC36-99GO10337
• Assignee: Midwest Research Institute (Kansas City, MO)
• Patent Number(s): US 6423145
• OSTI ID: 874609
• Country of Publication: United States
• Language: English

Related Subjects

dilute
acidmetal
salt
hydrolysis
lignocellulosics
modified
acid
method
hydrolyzing
cellulose
hemicellulose
lignocellulosic
material
conditions
obtain
overall
fermentable
sugar
yields
obtainable
comprising
impregnating
feedstock
mixture
amount
aqueous
solution
catalyst
metal
sufficient
provide
loading
impregnated
reactor
heating
period
time
hydrolyze
substantially
45
water
soluble
sugars
recovering
aqueous solution
metal salt
sufficient period
lignocellulosic material
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