Gold Nanoparticle Catalyst for FDMC Oxidative Esterification
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Solution Overview
Problem
The production of 2,5-furandicarboxylic acid (FDCA) is hindered by low solubility in industrial solvents and the use of explosive oxidizing agents, making it difficult to scale up and environmentally problematic due to petroleum-based plastic replacement challenges.
Innovation Solution
A method for preparing 2,5-furandimethylcarboxylate (FDMC) through oxidative esterification of 5-hydroxymethylfurfural (HMF) using a gold (Au)-nanoparticle-supported catalyst on hydroxyapatite (HAP) in a single vessel, with air and alcohol as reactants and solvents, under controlled temperature and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If pure oxygen is used as oxidizing agent for FDCA preparation, then oxidation reaction efficiency is improved, but safety deteriorates due to high explosivity
Solution Approach 1:
The patent changes the oxidizing agent from pure oxygen to air, fundamentally altering the oxidation conditions. This parameter change maintains oxidation capability while eliminating the explosivity hazard associated with pure oxygen, allowing safe large-scale production of FDCA and FDMC
2Productivity
If base is added to increase FDMC yield, then productivity is improved, but processing cost deteriorates
Solution Approach 1:
The Au/HAP catalyst system enables the oxidation reaction to proceed efficiently without requiring additional base additives. The catalyst itself provides the necessary catalytic activity, allowing the reaction to be self-sufficient and eliminating the need for costly base materials while maintaining high FDMC yield
3Adaptability or versatility
If FDCA is used as raw material, then polymer production capability is improved, but solubility deteriorates in industrial solvents
Solution Approach 1:
The patent changes the chemical structure parameter by producing FDMC (ester form) instead of FDCA (acid form). This structural modification fundamentally improves solubility in industrial solvents while maintaining the capability to produce PEF polymers, as the ester can be subsequently converted to the acid or used directly in polymerization
4Ease of manufacture
If HMF is used as raw material, then FDMC production is enabled, but scalability deteriorates due to difficulty in mass production
Solution Approach 1:
The Au/HAP catalyst acts as an intermediary that enables efficient conversion of HMF to FDMC under mild conditions using air as oxidant. This catalytic system bridges the gap between laboratory-scale synthesis and industrial mass production by providing high activity and selectivity that makes large-scale HMF utilization economically viable
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 safely produces FDMC with high selectivity and yield, avoiding explosive oxidizing agents and improving solubility, enabling a more efficient and environmentally friendly polymer production process.
Implementation Method 1
oxidative esterification of 5-hydroxymethylfurfural (HMF) using a gold (Au)-nanoparticle-supported catalyst
Implementation Method 2
gold (Au)-nanoparticle-supported catalyst on hydroxyapatite (HAP)
Data Source
Figure 1
Figure 2a~2f
Figure 3a~3g
AI summary
An embodiment of the present invention provides a method of preparing 2,5-furandimethylcarboxylate (FDMC), including preparing 2,5-furandimethylcarboxylate (FDMC) by subjecting a reaction mixture including 5-hydroxymethylfurfural (HMF), air, and an alcohol solvent to oxidative esterification in the presence of a gold (Au)-nanoparticle-supported catalyst, in which the gold (Au)-nanoparticle-supported catalyst includes a support and gold (Au) nanoparticles supported on the support.