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Title: Switchable ionic liquids for biomass pretreatment and enzymatic hydrolysis

Abstract

In one aspect, the present invention provides a method for preparing a sugar composition. The method includes: forming a mixture including polysaccharide biomass and an ionic liquid solution, wherein the ionic liquid solution contains water and an ionic liquid, and wherein the ionic liquid contains a dicarboxylic acid anion and a cation. The pH of the mixture is greater than or equal to about 10, and the molar ratio of the dicarboxylic acid anion to the cation is at least about 1:2. The method further includes: maintaining the mixture under conditions sufficient to dissolve at least a portion of the polysaccharide present in the polysaccharide biomass; reducing the pH of the mixture containing the dissolved polysaccharide to at least about 7; adding at least one glycoside hydrolase to the mixture having the reduced pH.

Inventors:
; ;
Issue Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1840440
Patent Number(s):
11118204
Application Number:
15/523,355
Assignee:
National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
Patent Classifications (CPCs):
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08H - DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
C - CHEMISTRY C12 - BIOCHEMISTRY C12P - FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE {
DOE Contract Number:  
AC02-05CH11231
Resource Type:
Patent
Resource Relation:
Patent File Date: 10/30/2015
Country of Publication:
United States
Language:
English

Citation Formats

Liszka, Michael, Sale, Kenneth, and Simmons, Blake A. Switchable ionic liquids for biomass pretreatment and enzymatic hydrolysis. United States: N. p., 2021. Web.
Liszka, Michael, Sale, Kenneth, & Simmons, Blake A. Switchable ionic liquids for biomass pretreatment and enzymatic hydrolysis. United States.
Liszka, Michael, Sale, Kenneth, and Simmons, Blake A. Tue . "Switchable ionic liquids for biomass pretreatment and enzymatic hydrolysis". United States. https://www.osti.gov/servlets/purl/1840440.
@article{osti_1840440,
title = {Switchable ionic liquids for biomass pretreatment and enzymatic hydrolysis},
author = {Liszka, Michael and Sale, Kenneth and Simmons, Blake A.},
abstractNote = {In one aspect, the present invention provides a method for preparing a sugar composition. The method includes: forming a mixture including polysaccharide biomass and an ionic liquid solution, wherein the ionic liquid solution contains water and an ionic liquid, and wherein the ionic liquid contains a dicarboxylic acid anion and a cation. The pH of the mixture is greater than or equal to about 10, and the molar ratio of the dicarboxylic acid anion to the cation is at least about 1:2. The method further includes: maintaining the mixture under conditions sufficient to dissolve at least a portion of the polysaccharide present in the polysaccharide biomass; reducing the pH of the mixture containing the dissolved polysaccharide to at least about 7; adding at least one glycoside hydrolase to the mixture having the reduced pH.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {9}
}

Works referenced in this record:

Evaluation of Toxicity and Biodegradability of Cholinium Amino Acids Ionic Liquids
journal, March 2013


Process for extractive fermentation
patent, September 1989


A review of separation technologies in current and future biorefineries
journal, August 2008


Ionic liquids as starch plasticizers or solvents
journal, November 2011


Methods for Fermentation of Xylose and Hexose Sugars
patent-application, November 2010


MEP pathway-mediated isopentenol production in metabolically engineered Escherichia coli
journal, September 2014


Novel method of acid hydrolysis of biomass and the recovery of sugars thereof by solvent extraction
patent-application, November 2012


Method and Apparatus for Treatment of Biomass Substrates
patent-application, January 2014


Amino Acid Ionic Liquids
journal, November 2007


One-pot ionic liquid pretreatment and saccharification of switchgrass
journal, January 2013


Biomass Hydrolysis
patent-application, August 2014