Dilute acid/metal salt hydrolysis of lignocellulosics

Patent · 01 January 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
• 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

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