5-(Halomethyl)furfural Production via Temperature-Dependent Phase Separation
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Solution Overview
Problem
Current methods for producing 5-(halomethyl)furfural, such as 5-(chloromethyl)furfural, are energy-intensive due to the need for distillation and recrystallization, and there is a lack of commercially viable methods to produce it in solid form for easier handling and storage.
Innovation Solution
The method involves temperature-dependent phase separation of 5-(halomethyl)furfural from a reaction mixture containing a feedstock, aqueous acid, and organic solvent, allowing for the production of solid 5-(halomethyl)furfural without the need for distillation, using solvents like linear alkylbenzenes that change solubility with temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If distillation is used to isolate 5-(halomethyl)furfural, then purification is achieved, but energy consumption increases significantly
Solution Approach 1:
The patent employs temperature-dependent phase separation where the organic solvent transitions from a single phase at reaction temperature to multiple phases at isolation temperature, enabling product separation without distillation. The organic phase separates into a product phase containing 5-(halomethyl)furfural and a solvent phase, achieving purification through phase transition rather than energy-intensive distillation.
Solution Approach 2:
The patent changes the temperature parameter from reaction temperature to isolation temperature to trigger phase separation. By lowering the temperature, the solubility of 5-(halomethyl)furfural in the organic solvent decreases, causing the organic phase to split into distinct product and solvent phases, thereby achieving purification through parameter change rather than distillation.
2Productivity
If liquid 5-(halomethyl)furfural is produced, then the reaction proceeds efficiently, but handling and storage become difficult
Solution Approach 1:
The patent uses temperature-dependent phase separation to transform the product from liquid form at reaction temperature to solid form at isolation temperature. The 5-(halomethyl)furfural crystallizes from the product phase upon cooling, providing a solid product that is easier to handle, transport, and store while maintaining reaction efficiency at the higher reaction temperature.
3Shape
If recrystallization is used to obtain solid 5-(halomethyl)furfural, then solid form is achieved, but additional energy-intensive steps are required
Solution Approach 1:
The patent merges the isolation step with the solidification step by using temperature-dependent phase separation. The same cooling process that separates the organic phase into product and solvent phases also causes the 5-(halomethyl)furfural to crystallize from the product phase, achieving both solid form and separation in one energy-efficient operation rather than requiring separate recrystallization steps.
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 approach reduces energy consumption and enables the production of solid 5-(halomethyl)furfural, improving handling and storage capabilities while avoiding the energy-intensive distillation process.
Implementation Method 1
separating at least a portion of the organic phase from the aqueous phase of the reaction mixture at a separation temperature
Implementation Method 2
cooling the separated organic phase from step (d) to an isolation temperature to produce a multiphasic organic mixture
Implementation Method 3
the multiphasic organic mixture has one more product phases and a solvent phase at the isolation temperature
Data Source
AI summary
The present disclosure provides methods to produce 5-(halomethyl)furfural, including 5-(chloromethyl)furfural, by acid-catalyzed conversion of biomass. The methods make use of certain organic solvents with temperature-dependent solubility for 5-(halomethyl)furfural. This allows for temperature-dependent phase separation of the 5-(halomethyl)furfural from the reaction mixture. In certain embodiments, solid 5-(halomethyl)furfural may be obtained. The solid 5-(halomethyl)furfural obtained may be amorphous or crystalline.