Ketoacid Stabilized Lignin Extraction from Biomass
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Solution Overview
Problem
Current industrial processes for extracting lignin from lignocellulosic biomass result in degradation due to harsh conditions, leading to loss of structural integrity and limited utilization of lignin as a renewable resource, with less than 2% being used for chemical or material production.
Innovation Solution
The use of biodegradable ketoacids or ketoesters during biomass extraction to stabilize lignin by forming ketals or esters, preventing condensation and allowing for further modification or depolymerization into monomers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If harsh conditions are used to extract lignin from biomass, then lignin can be separated from cellulose and hemicellulose, but the lignin structure degrades and loses its original integrity
Solution Approach 1:
The patent introduces an intermediary substance (stabilizing agent) that mediates between the harsh extraction conditions and the lignin structure. This stabilizing agent protects lignin from degradation while allowing effective separation from cellulose and hemicellulose, resolving the contradiction between separation efficiency and structural preservation.
Solution Approach 2:
The patent modifies the extraction parameters by introducing stabilizing agents and controlling reaction conditions to prevent lignin degradation. By changing the chemical environment during extraction, the process achieves both effective separation and preservation of lignin's original structure.
2Productivity
If lignin is extracted using conventional methods, then it can be obtained as a byproduct, but it degrades during extraction and becomes difficult to process
Solution Approach 1:
The patent applies preliminary action by adding stabilizing agents before the extraction process begins. This pre-protection measure ensures that lignin remains stable throughout extraction, maintaining both high extraction rates and good processability without requiring subsequent remediation.
Solution Approach 2:
The patent converts the harmful effect of harsh extraction conditions into a beneficial process by using stabilizing agents that enable these conditions to be used more effectively. The conditions that would normally cause degradation are transformed into conditions that achieve both high productivity and good product quality.
3Stability of the object's composition
If lignin is stabilized during extraction using ketoacids or ketoesters, then its natural structure is preserved, but additional processing steps are required
Solution Approach 1:
The patent applies self-service by using ketoacids or ketoesters that automatically stabilize lignin through their chemical properties during the extraction process. The stabilizing action occurs naturally as part of the extraction chemistry, reducing the need for additional separate stabilization steps and minimizing process complexity.
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 method enables the production of pure, stable lignin free of residual sugars and biomass fragments, maintaining its natural structure and allowing for efficient conversion into renewable chemical and material feedstocks, enhancing its processability and upgradability.
Implementation Method 1
The use of biodegradable ketoacids or ketoesters during biomass extraction to stabilize lignin by forming ketals or esters
Implementation Method 2
The use of biodegradable ketoacids or ketoesters during biomass extraction to stabilize lignin by forming ketals or esters
Data Source
AI summary
A process which makes use of biodegradable ketoacids or ketoesters for producing a ketoacid or ketoester-stabilized, pure lignin with no residual sugars and no biomass fragments and enriched in carboxylic acids, carboxylic esters or ketones is provided. The disclosed stabilized lignin can be further modified after extraction or utilized as a source of renewable aromatic feedstock by hydrogenolysis.