Lignocellulosic Biomass Extraction Segmentation
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Solution Overview
Problem
Current processes for extracting C5 and C6 sugars from lignocellulosic biomass are inefficient and costly, and there is a lack of effective methods to separate and valorize all three major components of biomass: hemicellulose, lignin, and cellulose in an economically viable manner.
Innovation Solution
A method involving the removal of hemicellulose sugars from biomass to obtain a lignin-containing remainder, followed by contacting this remainder with a lignin extraction solution comprising a limited-solubility solvent and water to separate lignin from cellulose, and subsequent purification steps to produce high-purity lignin and cellulose, including distillation, vacuum treatment, and dissolution in an organic solvent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional extraction processes are used to obtain C5 and C6 sugars from lignocellulosic biomass, then sugar extraction is achieved, but the process is inefficient and costly, and all three major components (hemicellulose, lignin, and cellulose) cannot be effectively separated and valorized
Solution Approach 1:
The invention divides the biomass processing into distinct stages: first extracting hemicellulose sugars, then separating lignin from the remaining cellulose-rich material using organic solvents. This segmentation allows each component to be processed independently with optimized conditions, improving overall extraction efficiency while reducing costs by avoiding the need for a single complex extraction process that attempts to handle all components simultaneously
Solution Approach 2:
The invention sequentially extracts different components from lignocellulosic biomass: hemicellulose is extracted first using aqueous solutions, then lignin is extracted from the remaining material using organic solvents like acetone or ethanol. This selective extraction approach enables efficient recovery of valuable components without requiring expensive simultaneous extraction methods, directly addressing both productivity and manufacturing cost concerns
2Device complexity
If a single extraction process is used to obtain all biomass components, then process simplicity is maintained, but effective separation and valorization of hemicellulose, lignin, and cellulose cannot be achieved
Solution Approach 1:
The process is segmented into multiple extraction stages, each targeting a specific biomass component. Hemicellulose is extracted in the first stage using aqueous solutions, followed by lignin extraction in the second stage using organic solvents. This segmentation achieves high component separation purity while maintaining reasonable process simplicity through the use of standard, well-understood extraction techniques that can be implemented with conventional equipment
Solution Approach 2:
The invention changes extraction parameters between stages: using aqueous solutions with specific pH and temperature for hemicellulose extraction, then switching to organic solvents with different polarity and temperature conditions for lignin extraction. These parameter changes enable effective separation of different components while maintaining process simplicity by relying on fundamental solubility differences rather than complex specialized equipment
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 efficient extraction and separation of high-purity lignin and cellulose, improving the overall processing efficiency and economic viability of biomass refining by producing valuable products such as bio-oil, carbon fibers, and other chemicals.
Implementation Method 1
contacting the lignin-containing remainder with a lignin extraction solution comprising a limited-solubility solvent and water to separate lignin from cellulose
Implementation Method 2
distillation or flash evaporating the lignin extract thereby removing the bulk of the limited-solubility solvent from the lignin extract
Implementation Method 3
applying a vacuum to the solid lignin thereby removing trace limited-solubility solvent or water from the solid lignin
Data Source
AI summary
The present invention relates to methods of processing lignocellulosic material to obtain hemicellulose sugars, cellulose sugars, lignin, cellulose and other high-value products such as asphalt and bio oils. Also provided are hemicellulose sugars, cellulose sugars, lignin, cellulose, and other high-value products such as asphalt and bio oils.