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Title: Aqueous fractionation of biomass based on novel carbohydrate hydrolysis kinetics

Abstract

A multi-function process for hydrolysis and fractionation of lignocellulosic biomass to separate hemicellulosic sugars from other biomass components comprising extractives and proteins; a portion of a solubilized lignin; cellulose; glucose derived from cellulose; and insoluble lignin from said biomass comprising: a) introducing either solid fresh biomass or partially fractioned lignocellulosic biomass material with entrained acid or water into a reactor and heating to a temperature of up to about 185.degree. C.-205.degree. C. b) allowing the reaction to proceed to a point where about 60% of the hemicellulose has been hydrolyzed in the case of water or complete dissolution in case of acid; c) adding a dilute acid liquid at a pH below about 5 at a temperature of up to about 205.degree. C. for a period ranging from about 5 to about 10 minutes; to hydrolyze the remaining 40% of hemicellulose if water is used. d) quenching the reaction at a temperature of up to about 140.degree. C. to quench all degradation and hydrolysis reactions; and e) introducing into said reaction chamber and simultaneously removing from said reaction chamber, a volumetric flow rate of dilute acid at a temperature of up to about 140.degree. C. to wash out the majoritymore » of the solubilized biomass components, to obtain improved hemicellosic sugar yields.« less

Inventors:
 [1]
  1. Littleton, CO
Issue Date:
Research Org.:
Midwest Research Institute, Kansas City, MO (United States)
OSTI Identifier:
873707
Patent Number(s):
6228177
Assignee:
Midwest Research Institute (Kansas City, MO)
Patent Classifications (CPCs):
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08H - DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07G - COMPOUNDS OF UNKNOWN CONSTITUTION
DOE Contract Number:  
AC36-98GO10337
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
aqueous; fractionation; biomass; based; novel; carbohydrate; hydrolysis; kinetics; multi-function; process; lignocellulosic; separate; hemicellulosic; sugars; components; comprising; extractives; proteins; portion; solubilized; lignin; cellulose; glucose; derived; insoluble; introducing; solid; fresh; partially; fractioned; material; entrained; acid; water; reactor; heating; temperature; 185; degree; -205; allowing; reaction; proceed; 60; hemicellulose; hydrolyzed; complete; dissolution; adding; dilute; liquid; ph; below; 205; period; ranging; 10; minutes; hydrolyze; remaining; 40; quenching; 140; quench; degradation; reactions; chamber; simultaneously; removing; volumetric; flow; rate; wash; majority; obtain; improved; hemicellosic; sugar; yields; simultaneously removing; reaction chamber; flow rate; dilute acid; volumetric flow; biomass material; lignocellulosic biomass; biomass components; biomass comprising; acid liquid; separate hemicellulosic; components comprising; multi-function process; obtain improved; hemicellulosic sugars; cellulosic sugars; aqueous fraction; /127/435/999/

Citation Formats

Torget, Robert W. Aqueous fractionation of biomass based on novel carbohydrate hydrolysis kinetics. United States: N. p., 2001. Web.
Torget, Robert W. Aqueous fractionation of biomass based on novel carbohydrate hydrolysis kinetics. United States.
Torget, Robert W. Mon . "Aqueous fractionation of biomass based on novel carbohydrate hydrolysis kinetics". United States. https://www.osti.gov/servlets/purl/873707.
@article{osti_873707,
title = {Aqueous fractionation of biomass based on novel carbohydrate hydrolysis kinetics},
author = {Torget, Robert W},
abstractNote = {A multi-function process for hydrolysis and fractionation of lignocellulosic biomass to separate hemicellulosic sugars from other biomass components comprising extractives and proteins; a portion of a solubilized lignin; cellulose; glucose derived from cellulose; and insoluble lignin from said biomass comprising: a) introducing either solid fresh biomass or partially fractioned lignocellulosic biomass material with entrained acid or water into a reactor and heating to a temperature of up to about 185.degree. C.-205.degree. C. b) allowing the reaction to proceed to a point where about 60% of the hemicellulose has been hydrolyzed in the case of water or complete dissolution in case of acid; c) adding a dilute acid liquid at a pH below about 5 at a temperature of up to about 205.degree. C. for a period ranging from about 5 to about 10 minutes; to hydrolyze the remaining 40% of hemicellulose if water is used. d) quenching the reaction at a temperature of up to about 140.degree. C. to quench all degradation and hydrolysis reactions; and e) introducing into said reaction chamber and simultaneously removing from said reaction chamber, a volumetric flow rate of dilute acid at a temperature of up to about 140.degree. C. to wash out the majority of the solubilized biomass components, to obtain improved hemicellosic sugar yields.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}