Hydroxyl radical/dilute acid hydrolysis of lignocellulosic materials
AssigneeGas Technology Institute
InventorsBhupendra Soni, Thomas Hayes, Vipul Srivastava
Life of this patent
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Abstract
A method for processing lignocellulosic materials in which a lignocellulosic feedstock material is contacted with a mixture of dilute acid, metal salt catalyst and hydrogen peroxide and/or hydrogen peroxide-producing chemicals, resulting in the formation of an impregnated lignocellulosic material impregnated with at least one hydroxyl radical. The impregnated lignocellulosic material is then hydrolyzed.
Claims23
A method for processing lignocellulosic materials comprising the steps of:
- contacting a lignocellulosic feedstock material with a mixture comprising at least one dilute acid, a metal salt catalyst and at least one of hydrogen peroxide and hydrogen peroxide-producing chemicals, forming an impregnated lignocellulosic material comprising at least one hydroxyl radical;
- and
- heating said impregnated lignocellulosic material to a temperature in a range of about 100° C. to about 250° C., whereby at least a portion of said impregnated lignocellulosic material is hydrolyzed.
A method for hydrolyzing lignocellulosic materials comprising the steps of:
- introducing at least one lignocellulosic material into a reactor vessel;
- introducing a mixture comprising at least one dilute acid, at least one metal salt and at least one of hydrogen peroxide and at least one hydrogen peroxide-producing chemical into said reactor vessel;
- and
- heating said lignocellulosic material and said mixture in said reactor vessel to a temperature in a range of about 100° C. to about 250° C., resulting in hydrolysis of at least a portion of said lignocellulosic material.
A method for hydrolyzing lignocellulosic materials comprising the steps of:
- impregnating at least one lignocellulosic material with hydroxyl radicals, forming an impregnated lignocellulosic material;
- and
- hydrolyzing said impregnated lignocellulosic material by one of dilute acid hydrolysis and enzymatic hydrolysis.
Dependencies are inferred from the claim text.