Lignocellulosic Hydrolysate Oxidation for Sugar Purification
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Solution Overview
Problem
Current processes for extracting and purifying sugars from wood hydrolysates are hindered by the presence of furfural, hydroxymethylfurfural, and polymerized compounds, leading to equipment deposits and purification challenges, which obstruct the industrialization of sugar valorization from hemicelluloses.
Innovation Solution
A process involving oxidation of lignocellulosic hydrolyzates with oxidants like hydrogen peroxide or ozone at temperatures between 20 and 100°C reduces the molecular weight and quantity of polymers and furfural derivatives without degrading sugars, facilitating easy purification and valorization of monosaccharides, oligosaccharides, and polysaccharides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional purification methods are used on wood hydrolysates, then sugar extraction is attempted, but equipment deposits form and purification becomes difficult due to furfural, hydroxymethylfurfural, and polymerized compounds
Solution Approach 1:
The patent applies preliminary oxidation treatment to the hydrolysate before sugar purification. By oxidizing furfural and hydroxymethylfurfural compounds in advance, the process prevents these substances from causing equipment deposits and purification difficulties during subsequent sugar extraction steps
Solution Approach 2:
The patent converts harmful furfural and hydroxymethylfurfural compounds into beneficial oxidation products. Through controlled oxidation, these problematic substances that cause deposits are transformed into compounds that are easier to remove, thereby improving the overall purification process
2Manufacturing precision
If high temperature treatment is applied to hydrolysates, then polymer degradation occurs, but sugar degradation also increases
Solution Approach 1:
The patent changes the temperature parameter from high temperature to moderate temperature (20-100°C) for oxidation treatment. This parameter modification allows sufficient polymer degradation and furfural oxidation while preventing excessive sugar degradation that would occur at higher temperatures
Solution Approach 2:
The patent uses strong oxidants to accelerate the oxidation process at moderate temperatures. This enables effective degradation of furfural and hydroxymethylfurfural compounds without requiring high temperatures that would cause sugar degradation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This process effectively reduces the molecular weight and quantity of polymers and furfural derivatives, enabling the easy separation and purification of sugars, thus valorizing hemicellulose sugars without compromising the papermaking process for cellulose production.
Implementation Method 1
A process involving oxidation of lignocellulosic hydrolyzates with oxidants like hydrogen peroxide or ozone at temperatures between 20 and 100°C reduces the molecular weight and quantity of polymers and furfural derivatives
Implementation Method 2
oxidation of lignocellulosic hydrolyzates with oxidants like hydrogen peroxide or ozone
Implementation Method 3
oxidation of lignocellulosic hydrolyzates with oxidants like hydrogen peroxide or ozone at temperatures between 20 and 100°C reduces the molecular weight and quantity of polymers and furfural derivatives
Data Source
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AI summary
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 mixture by 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.