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Method for preparing monosaccharide and/or oligosaccharide and/or polysaccharide mixture by purifying lignocellulosic material hydrolysate

A technology of lignocellulose and hydrolyzate, applied in chemical instruments and methods, preparation of oligosaccharides, sugar derivatives, etc., can solve problems such as industrialization obstacles of extraction and treatment methods, and achieve the effect of easy separation and purification

Inactive Publication Date: 2018-12-21
INSTITUT NAT POLYTECHN DE GRENOBLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] These problems are real obstacles to the chemical reuse of sugars derived from hemicellulose, as well as to the industrialization of methods of extraction and processing of these sugars

Method used

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  • Method for preparing monosaccharide and/or oligosaccharide and/or polysaccharide mixture by purifying lignocellulosic material hydrolysate
  • Method for preparing monosaccharide and/or oligosaccharide and/or polysaccharide mixture by purifying lignocellulosic material hydrolysate
  • Method for preparing monosaccharide and/or oligosaccharide and/or polysaccharide mixture by purifying lignocellulosic material hydrolysate

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Embodiment

[0084] The mixture of hydrolyzate of lignocellulosic material and monosaccharide and / or oligosaccharide and / or polysaccharide is analyzed by high-pressure high performance anion exchange chromatography and pulsed amperometric detection (HPAEC-PAD, High Performance Anion Exchange Chromatography-Pulsed Amperometric Detection). The chromatographic system is a Dionex ICS5000 model consisting of a guard column (50mm×4mm), a CarboPac PA10 column (250mm×4mm) and a pulsed amperometric detector consisting of a reference electrode and a gold electrode.

[0085] 1) Preparation of hydrolyzate of lignocellulosic material

[0086] The hydrolyzate of lignocellulosic material is obtained by autohydrolysis of 400 g (expressed as dry matter) of hardwood wood chips under the following conditions:

[0087] ·Liquid / dry wood ratio=2

[0088] ·Temperature: 170℃

[0089] · Time taken to reach temperature: 30min

[0090] ·Temperature holding time: 120min

[0091] Cooling time (to 50°C): 30min

[...

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Abstract

The field of this invention is that of recycling sugars from the by-products of the paper and cellulose industries and lignocellulosic biorefineries. The aim of the invention is to facilitate extraction and purification of sugars contained in wood hydrolysates. To this end, the present invention relates to a method for preparing a monosaccharide and / or oligosaccharide and / or polysaccharide mixtureby purifying a lignocellulosic material hydrolysate. Said hydrolysate includes hemicelluloses in the form of monomers, oligomers, and optionally polymers, and said method includes at least one step of oxidizing said hydrolysate using at least one oxidant. Said method makes it possible to obtain a monosaccharide and / or oligosaccharide and / or polysaccharide mixture having a low amount of furfural and / or hydroxymethylfurfural and including polymers having a low molecular mass in weight and / or in number.

Description

technical field [0001] The field of the invention is that of the reuse of sugars in the by-products of the paper and cellulose industries and lignocellulosic biorefineries. [0002] In particular, the present invention relates to the preparation of mixtures of monosaccharides and / or oligosaccharides and / or polysaccharides by purifying a hydrolyzate of lignocellulosic material comprising monomeric, oligomeric and optionally polymeric form of hemicellulose. Background technique [0003] Lignocellulosic material is the major component of plant cell walls. It consists of cellulose, hemicellulose, lignin and extractables in variable proportions depending on the origin of the material. Wood represents the majority of lignocellulosic materials available. [0004] The paper industry uses wood and extracts cellulose fibers from it to produce pulp. According to standard methods, cellulose is extracted from wood by high temperature alkaline treatment (Kraft process). The degradati...

Claims

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Application Information

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IPC IPC(8): C07H1/08C07H3/02C13K1/02C08B1/00
CPCC07H3/02C13K1/02C08B37/0057C08H8/00C08L5/00C08L5/14C13K13/00C07H1/08C07H3/06C08B37/0003
Inventor 克莉丝汀·希拉多米尼克·拉什纳尔杰里米·布歇
Owner INSTITUT NAT POLYTECHN DE GRENOBLE
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