CMF Biphasic Reactor Continuous Extraction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing 5-(chloromethyl)-2-furaldehyde (CMF) from saccharides lack a scalable and repeatable production system, with previous continuous flow systems facing clogging issues due to Hydrothermal Carbon (HTC) by-products and inefficient yield, and existing batch reactions produce unwanted by-products like 5-(hydroxymethyl)furfural and levulinic acid.
Innovation Solution
A continuous, biphasic-flow reactor system is employed, using saccharides, hydrochloric acid, and an organic solvent at controlled temperatures and pressures to produce CMF, with immediate cooling to reduce HTC formation and a basic wash to enhance yield, allowing for high-yield production of CMF and its derivatives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a continuous flow system is used to produce CMF from saccharides, then productivity is improved, but the system becomes unreliable due to clogging from HTC by-products
Solution Approach 1:
The patent extracts and removes HTC by-products from the reaction system through continuous filtration and phase separation. The filtration system selectively removes solid HTC particles from the liquid reaction mixture, preventing clogging while maintaining continuous operation. This extraction of harmful by-products resolves the contradiction between continuous production and system reliability.
Solution Approach 2:
The patent introduces an intermediary organic solvent phase that facilitates product separation and reduces HTC formation. The biphasic system (aqueous acid phase and organic solvent phase) acts as an intermediary mechanism where CMF preferentially partitions into the organic phase, reducing its concentration in the aqueous phase and thereby minimizing further degradation to HTC. This intermediary phase enables continuous operation without clogging.
2Manufacturing precision
If batch reaction is used to produce CMF, then by-product formation is reduced, but productivity is lowered due to long reaction times
Solution Approach 1:
The patent implements continuous reaction and continuous separation operations. Reactants are continuously fed into the reactor, reaction proceeds continuously under optimized conditions, and products are continuously removed via phase separation and filtration. This continuous operation maintains high selectivity to CMF while achieving high productivity, resolving the contradiction between batch precision and continuous production rate.
Solution Approach 2:
The patent continuously extracts CMF from the reaction mixture into an organic solvent phase as it forms. This continuous extraction removes CMF from the aqueous acid environment, preventing its degradation to by-products like HMF and levulinic acid, while maintaining high production rates through continuous processing.
3Productivity
If reaction temperature is increased to improve reaction rate, then productivity is improved, but HTC formation increases as a harmful by-product
Solution Approach 1:
The patent introduces an organic solvent as an intermediary phase that preferentially dissolves CMF. This creates a biphasic system where CMF is continuously extracted into the organic phase, reducing its concentration in the aqueous phase. This intermediary extraction mechanism prevents CMF degradation to HTC even at elevated temperatures, allowing high reaction rates without excessive HTC formation.
Solution Approach 2:
The patent continuously removes CMF from the hot aqueous reaction environment into a separate organic phase. This extraction protects CMF from thermal degradation to HTC while maintaining high reaction temperatures for fast kinetics. The separation occurs in-line during continuous operation, resolving the contradiction between reaction rate and by-product formation.
4Ease of manufacture
If aqueous acid is used to produce CMF from saccharides, then manufacturing simplicity is improved, but product degradation occurs forming unwanted by-products
Solution Approach 1:
The patent uses an organic solvent as an intermediary phase that selectively extracts CMF from the aqueous acid reaction mixture. This biphasic system maintains the simplicity of using aqueous acid for CMF synthesis while simultaneously protecting CMF from acid-catalyzed degradation to by-products like HMF and levulinic acid. The organic phase acts as a protective intermediary, resolving the contradiction between process simplicity and product purity.
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
The system achieves efficient production of CMF with a yield of at least 50% and reduces HTC formation, enabling scalable and repeatable production by continuous phase separation and stabilization, overcoming previous limitations of clogging and by-product issues.
Implementation Method 1
contacting saccharides in a pure or crude form, hydrochloric acid, and an organic solvent, by way of a continuous, biphasic-flow reactor assembly at a temperature from about 60 degree C. to about 200 degree C. and pressures from about 1 atm to 10 atm, such that CMF is produced
Implementation Method 2
immediate cooling to reduce HTC formation
Implementation Method 3
separating 5-(chloromethyl)-2-furaldehyde (CMF) by liquid/liquid and solid/liquid phase separation
Data Source
AI summary
The present invention describes methods and apparatuses for the synthesis of 5-(chloromethyl)-2-furaldehyde (CMF) from saccharides in pure or crude form, the method comprising: (a) continuously contacting saccharides in pure or crude form, hydrochloric acid, and an organic solvent, by way of a continuous, biphasic-flow reactor assembly at a temperature from about 60 degrees C. to about 200 degrees C. and pressures from about 1 atmosphere to about 20 atmospheres, such that CMF is produced; (b) separating 5-(chloromethyl)-2-furaldehyde by liquid/liquid and solid/liquid phase separation; (c) producing at least five kilograms per day with at least 50% yield. Embodiments of the present invention can produce CMF in a continuous fashion, with high yield and without degradation of CMF to such side products as 5-(hydroxymethyl)furfural (HMF), 2-(2-hydroxyacetyl)furan (HAF) and levulinic acid (LA).