Xylose Isolation via Boronate Complex Precipitation
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Solution Overview
Problem
Current processes for isolating C5 sugars like xylose from aqueous solutions are inefficient, leading to low sugar concentrations and sugar degradation, which limits their utility in biofuel and biochemical production due to the need for downstream concentration steps that can be toxic and deteriorate the sugars.
Innovation Solution
A process involving the combination of a boron compound with an aqueous xylose solution to form a boron derivative, which is then isolated as a precipitate, dissolved in a solvent, and finally isolated using a boron capture agent to produce solid, anhydrous xylose suitable for biochemical and biofuel production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If hydrolytic techniques are used to extract monosaccharides from biomass, then sugar extraction is achieved, but sugar concentration remains too low for downstream processing
Solution Approach 1:
The patent uses boronic acids as intermediary compounds that form boronate complexes with sugars. These complexes can be extracted into organic phases or precipitated, effectively concentrating the sugars from dilute hydrolyzates into a form suitable for downstream processing, thus resolving the concentration problem while maintaining processing efficiency
Solution Approach 2:
The patent changes the chemical state of sugars by forming boronate complexes, which alters their solubility and extraction properties. This parameter change enables concentration of sugars from dilute aqueous solutions without requiring energy-intensive evaporation or concentration steps
2Quantity of substance
If concentration steps are applied to increase sugar concentration, then downstream processing becomes feasible, but sugar degradation occurs and yields are limited
Solution Approach 1:
Boronate complexes serve as protective intermediaries that allow sugar concentration through extraction or precipitation rather than thermal concentration. This avoids direct heating of sugars that causes degradation, maintaining sugar integrity while achieving necessary concentration levels
Solution Approach 2:
The patent replaces mechanical/thermal concentration methods (evaporation, filtration under pressure) with chemical extraction methods using boronate complexes. This substitution eliminates the need for high-temperature processing that degrades sugars, preserving their integrity for downstream applications
3Quantity of substance
If lipophilic boronic acids are used to extract sugars, then sugar extraction is improved, but the extracted sugars are limited in utility due to aqueous solution incompatibility
Solution Approach 1:
The patent changes the physical state of extracted sugars from aqueous solution to solid precipitate or anhydrous form through controlled hydrolysis of boronate complexes. This parameter change makes the sugars compatible with diverse downstream applications including fermentation, chemical synthesis, and enzymatic processes that require non-aqueous conditions
Solution Approach 2:
The extraction and recovery process uses periodic action by forming boronate complexes for extraction, then hydrolyzing them to release free sugars in a controlled manner. This periodic formation and hydrolysis allows flexible control over the final sugar form, adapting to different downstream processing requirements
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 effectively isolates xylose in a form that is compatible with biofuel and biochemical conversion schemes, reducing sugar degradation and increasing yield, while also allowing for the recovery and reuse of boron compounds, thus improving process economics and reducing production costs.
Implementation Method 1
combining a boron compound with the aqueous solution to form a boron derivative of the xylose
Implementation Method 2
isolating the boron derivative of the xylose from the aqueous solution as a precipitate
Implementation Method 3
isolating the xylose from the solvent as a precipitate using a boron capture agent
Data Source
AI summary
Processes for isolating xylose from an aqueous solution. A representative process can comprise providing an aqueous solution comprising xylose; combining a boron compound with the aqueous solution to form a boron derivative of the xylose; isolating the boron derivative of the xylose from the aqueous solution as a precipitate; dissolving the boron derivative of the xylose in a solvent; and isolating the xylose from the solvent as a precipitate using a boron capture agent.