Enzymatic Glucose to Fructose Conversion via Segmentation
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Solution Overview
Problem
Current processes for producing furan derivatives from D-glucose face challenges such as low initial substrate concentrations and overall yields, complex chromatographic methods for purifying fructose, and the formation of by-products, especially at high temperatures and pressures.
Innovation Solution
A process involving enzymatic conversion of D-glucose to D-fructose using multiple oxidoreductases, followed by regeneration of cofactors, allowing for high initial glucose concentrations and efficient conversion to furan derivatives, including hydroxymethylfurfural, using acidic catalysts and solvents like N-methyl-2-pyrrolidone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If D-glucose is converted to D-fructose using D-glucose isomerase, then the conversion process is simple and suitable for industrial applications, but only about 42% of D-glucose can be converted to D-fructose
Solution Approach 1:
The conversion process is segmented into two distinct enzymatic steps: first reducing D-glucose to D-sorbitol using xylose reductase, then oxidizing D-sorbitol to D-fructose using sorbitol dehydrogenase. This segmentation allows each enzyme to perform its specific function optimally, achieving complete conversion whereas a single isomerase enzyme is limited to 42% conversion efficiency.
Solution Approach 2:
D-sorbitol is introduced as an intermediate compound in the conversion pathway from D-glucose to D-fructose. This intermediate allows the use of two specialized enzymes (xylose reductase and sorbitol dehydrogenase) that work sequentially to achieve complete conversion, bypassing the limitations of direct isomerase conversion.
2Manufacturing precision
If chromatographic methods are used to enrich D-fructose, then D-fructose purity is improved, but the process complexity increases significantly
Solution Approach 1:
The dual-enzyme system performs self-service by achieving complete conversion of D-glucose to D-fructose through sequential enzymatic reactions, eliminating the need for external chromatographic purification processes. The enzymatic pathway itself provides the purification function by selectively converting glucose to fructose without requiring complex separation equipment.
3Speed
If high temperatures and pressures are used in furan derivative production, then reaction speed is improved, but by-product formation increases
Solution Approach 1:
The harsh mechanical conditions of high temperature and pressure are replaced with a mild enzymatic system operating at physiological temperatures. The xylose reductase and sorbitol dehydrogenase enzymes catalyze the conversion efficiently under gentle conditions, avoiding the thermal degradation and by-product formation associated with high-temperature processing while maintaining high reaction rates through enzymatic catalysis.
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 achieves high conversion rates of D-glucose to D-fructose and subsequent furan derivatives with improved yields and reduced by-product formation, enabling more efficient and economically viable production of furan compounds.
Implementation Method 1
first an enzymatically catalyzed reduction to D-sorbitol and subsequently an enzymatically catalyzed oxidation of D-sorbitol to D-fructose are carried out
Implementation Method 2
first an enzymatically catalyzed reduction to D-sorbitol and subsequently an enzymatically catalyzed oxidation of D-sorbitol to D-fructose are carried out
Implementation Method 3
D-glucose is converted to D-fructose with the involvement of two or more oxidoreductases
Implementation Method 4
D-fructose is converted to furan derivatives using acidic catalysts and solvents like N-methyl-2-pyrrolidone
Data Source
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AI summary
Disclosed is a method for obtaining furan derivatives from D-glucose. In said method, A) D-glucose is transformed into D-fructose in an enzymatic process in which redox cofactors are used and regenerated, one of the two redox cofactors being obtained in the reduced form thereof and the other redox cofactor being obtained in the oxidized form thereof as a result of at least two additional enzymatically catalyzed redox reactions taking place in the same reaction batch, D-glucose being transformed into D-fructose with the aid of two or more oxidoreductases, and B) D-fructose is converted into furan derivatives. The use of furan derivatives produced in said manner is also disclosed.