Biphasic-Flow Reactor for High-Yield CMF Production
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Solution Overview
Problem
Current methods for producing 5-(chloromethyl)-2-furaldehyde (CMF) from saccharides lack scalability and repeatability, with previous continuous flow systems experiencing clogging issues due to Hydrothermal Carbon (HTC) by-products and inefficient yield, particularly in larger production scales.
Innovation Solution
A continuous, biphasic-flow reactor system is employed, using saccharides, hydrochloric acid, and an organic solvent at controlled temperatures and pressures, followed by immediate cooling to reduce HTC formation, and a basic aqueous wash to enhance CMF yield and purity, enabling production of at least five kilograms per day with a 50% yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a continuous flow system is used for CMF production, then productivity is improved, but reliability deteriorates due to filter clogging by HTC by-products
Solution Approach 1:
The patent extracts and removes HTC by-products from the reaction system through filtration and centrifugation units, separating them from the main reaction stream. This continuous removal prevents filter clogging and maintains system reliability while preserving high productivity
Solution Approach 2:
The patent implements preliminary cooling of the reaction mixture before filtration to precipitate and remove HTC by-products in advance. This preliminary action prevents clogging of downstream filtration systems and ensures continuous reliable operation
2Productivity
If reaction temperature is increased to improve conversion, then productivity is improved, but harmful factors increase due to HTC formation
Solution Approach 1:
The patent converts the harmful effect of high temperature into a beneficial process by using controlled thermal energy to drive the desired CMF formation reaction while simultaneously managing HTC formation through rapid cooling and filtration. The high temperature is utilized productively but its harmful by-products are systematically removed
Solution Approach 2:
The patent rapidly cools the reaction mixture immediately after the reaction zone to skip the temperature range where HTC formation is most problematic. This rapid temperature drop freezes the product distribution and prevents further harmful by-product formation, allowing high conversion at elevated temperatures
3Manufacturing precision
If organic solvent is added continuously to extract products, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the extraction function with the existing reaction flow system by introducing organic solvent in a manner that combines product extraction with the main reaction stream. This integration achieves high separation precision while minimizing additional system 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
The method effectively attenuates HTC formation, enhances CMF yield, and stabilizes the product, overcoming previous scalability and repeatability limitations, allowing for efficient high-yield CMF production in a production-scale system.
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
separating 5-(chloromethyl)-2-furaldehyde (CMF) by liquid/liquid and solid/liquid phase separation
Implementation Method 3
separating 5-(chloromethyl)-2-furaldehyde (CMF) by liquid/liquid and solid/liquid phase separation
Implementation Method 4
By immediately cooling the reaction medium after reaction by means of a heat remover as taught herein, HTC formation is attenuated
Implementation Method 5
following liquid/liquid extraction of the organic phase containing CMF from the aqueous acid phase, a washing of the organic phase with a basic aqueous solution, as taught herein, serves to further enhance the yield of CMF, and also reduces organic-soluble HTC
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).