Furoic Acid Carbonylation in Biphasic Solvents for Lower-Cost FDCA
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high cost and harsh reaction conditions associated with the production of 2,5-furandicarboxylic acid (FDCA) from furoic acid limit its large-scale production and application.
Innovation Solution
A method involving the carbonylation of furoic acid using a biphasic solvent system composed of a basic metal salt solution and a biomass-based polar aprotic solvent, with optional CO2-donating reagents, followed by phase separation and purification steps to obtain 2,5-furandicarboxylic acid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cesium carbonate-assisted direct carbonylation is used to prepare FDCA from furoic acid, then FDCA can be synthesized, but the reaction conditions are harsh and the process is complex
Solution Approach 1:
The patent changes the reaction parameters by using potassium carbonate instead of cesium carbonate, and employs a biphasic solvent system (water/organic solvent) with moderate temperatures (80-120°C) and pressures (1-5 MPa), significantly milder than conventional methods. This parameter optimization simplifies the manufacturing process while maintaining effectiveness.
Solution Approach 2:
The patent introduces a biphasic solvent system as an intermediary medium that facilitates the carbonylation reaction. The two-phase system (aqueous phase with K2CO3 and organic phase with substrate) acts as a mediator to improve reactant contact and product separation, reducing process complexity.
2Ease of manufacture
If bromination of furoic acid is performed to obtain FDCA, then FDCA can be synthesized, but the production cost increases significantly
Solution Approach 1:
The patent extracts and eliminates the bromination step from the synthesis pathway. By directly carbonylating furoic acid using K2CO3-assisted method, the process removes the expensive bromine reagent and associated purification steps, significantly reducing production costs while maintaining synthetic feasibility.
Solution Approach 2:
The patent replaces expensive cesium carbonate with cheaper potassium carbonate, and eliminates the need for expensive bromination reagents. The use of readily available, low-cost materials (K2CO3, water, common organic solvents) makes the process economically viable for large-scale production.
3Productivity
If disproportionation of furoic acid is used to prepare FDCA, then FDCA can be obtained, but many isomers are formed and reaction conditions are harsh
Solution Approach 1:
The patent applies local quality by creating a specific reaction environment in each phase of the biphasic system. The aqueous phase provides basic conditions (K2CO3) for controlled carbonylation, while the organic phase dissolves the substrate. This localized optimization ensures high selectivity for the desired 2,5-FDCA product and minimizes isomer formation.
Solution Approach 2:
The patent optimizes reaction parameters including temperature (80-120°C), pressure (1-5 MPa), and base concentration to achieve high selectivity. These controlled parameters ensure that only the desired FDCA isomer is formed in high yield, avoiding the isomer mixture problems of disproportionation methods.
4Productivity
If HMF oxidation pathway is used to synthesize FDCA, then large-scale production has been achieved, but the production cost is much higher than terephthalic acid
Solution Approach 1:
The patent uses inexpensive starting materials (furoic acid and K2CO3) and common solvents to replace the expensive HMF pathway. The direct carbonylation method achieves large-scale production capability while using low-cost reagents, making FDCA economically competitive with traditional terephthalic acid production.
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 reduces reaction energy barriers and costs by utilizing a biphasic solvent system that acts as both a solvent and catalyst, achieving lower reaction temperatures and pressures, and enhances the carbonylation reaction rate while maintaining high product purity and yield.
Implementation Method 1
A method for synthesizing 2,5-furandicarboxylic acid by carbonylation of furoic acid, including adding furoic acid and an organic base to a biphasic solvent system
Implementation Method 2
separating two phases after completing a reaction
Implementation Method 3
adding an organic acid to the aqueous phase; and collecting a precipitate by filtration
Data Source
AI summary
A method for synthesizing 2,5-furandicarboxylic acid by carbonylation of furoic acid is provided. In this method, furoic acid and an organic base are added to a biphasic solvent system. After completion of the reaction, two phases are separated, the organic acid is added to the aqueous phase, and the precipitate is collected by filtration. The precipitate is then washed and dried to obtain the 2,5-furandicarboxylic acid. The biphasic solvent system is a mixture of a basic metal salt solution and a biomass-based polar aprotic solvent, and a CO2-donating reagent may or may not be added to the biphasic solvent system. The method has simple synthesis and separation and purification processes, high product purity, a high carbonylation reaction rate, reduced raw material costs, and is in line with the development concept of green chemistry.