Cobalt-Manganese-Bromide Catalyst for FDCA Oxidation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing 2,5-furandicarboxylic acid (FDCA) from 5-hydroxymethylfurfural (HMF) and its derivatives result in low yields and incorrect identification of products, with existing catalysts and conditions failing to effectively oxidize esters of HMF to FDCA, leading to significant yield losses and mischaracterization of reaction products.
Innovation Solution
The use of an oxidation catalyst based on cobalt and manganese with a bromide component at temperatures higher than 140 °C to oxidize HMF and its esters, such as 5-(acetoxymethyl)furfural, to achieve high yields of FDCA, along with the subsequent esterification of FDCA to form a dialkyl ester, utilizing a cobalt-manganese-bromine catalyst system and optimizing reaction conditions like temperature, pressure, and catalyst composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Co/Mn/Br catalyst is used in acetic acid at temperatures between 85 and 110 °C, then the reaction proceeds with moderate stability, but the yield of FDCA is low (maximum 35.2%) and AMF accumulates as a stable side product
Solution Approach 1:
The patent applies parameter changes by increasing the reaction temperature from the conventional 85-110 °C range to 140-200 °C. This temperature increase fundamentally changes the reaction kinetics, enabling complete oxidation of AMF to FDCA while preventing AMF accumulation. The higher temperature overcomes the stability barrier of AMF that limits yield at lower temperatures.
2Productivity
If oxidation temperature is increased to improve FDCA yield from AMF, then conversion efficiency improves, but side reactions and material loss increase
Solution Approach 1:
The patent employs a composite catalyst system combining Co, Mn, and Br components that works synergistically at elevated temperatures. This composite catalyst enables high-temperature oxidation (140-200 °C) while maintaining selectivity for FDCA formation, preventing the uncontrolled side reactions that would otherwise cause material loss at such temperatures.
3Adaptability or versatility
If HMF esters are used as starting material, then feedstock versatility is improved, but oxidation to FDCA fails under conventional conditions due to AMF stability
Solution Approach 1:
The patent enables oxidation of HMF esters (particularly acetates) by changing the temperature parameter to 140-200 °C. At these elevated temperatures, the stable AMF intermediate that blocks oxidation at lower temperatures becomes reactive enough to proceed to FDCA, thus enabling versatile use of HMF esters as feedstocks while maintaining reliable oxidation effectiveness.
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 enables the production of FDCA in high yields and corrects the misidentification of products, allowing for the efficient conversion of HMF and its esters to FDCA, which can then be used in the production of furan-based monomers and polyesters, overcoming previous limitations in yield and product characterization.
Implementation Method 1
contacting a feed comprising a compound selected from the group consisting of 5-hydroxymethylfurfural ('HMF'), an ester of 5-hydroxymethyl-furfural, 5-methylfurfural, 5-(chloromethyl)furfural, 5-methylfuroic acid, 5-(chloromethyl)furoic acid, 2,5-dimethylfuran and a mixture of two or more of these compounds with an oxidant in the presence of an oxidation catalyst at a temperature higher than 140 °C
Implementation Method 2
The oxidation of HMF over gold based catalysts (ChemSusChem, 2008, 1, 1-4). Partenheimer et al (Adv. Synth. Catal. 2001, 343, pp 102-11) describe the synthesis of 2,5-furandicarboxylic acid by catalytic air-oxidation of 5-hydroxymethylfurfural with metal/bromide catalysts such as Co/Mn/Br
Data Source
AI summary
The application describes a method for the preparation of 2,5-furan dicarboxylic acid comprising the step of contacting a feed comprising a compound selected from the group consisting of 5-hydroxymethylfurfural ("HMF"), an ester of 5-hydroxymethyl-furfural, 5-methylfurfural, 5-(chloromethyl)furfural, 5-methylfuroic acid, 5-(chloromethyl)furoic acid, 2,5-dimethylfuran and a mixture of two or more of these compounds with an oxidant in the presence of an oxidation catalyst at a temperature higher than 140 °C.