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US 12,049,456 B2Granted
Purified 2,5-furandicarboxylic acid pathway products
AssigneeStora Enso OYJ
InventorsHenricus Johannes Cornelis Den Ouden, Valery Sokolovskii, Thomas R. Boussie, Gary M. Diamond, Eric L. Dias, Guang Zhu, Staffan Torssell, Vincent J. Murphy
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Abstract
The present disclosure provides processes for the purification of 2,5-furandicarboxylic acid (FDCA). The present disclosure further provides crystalline preparations of purified FDCA, as well as processes for making the same. In addition, the present disclosure provides mixtures used in processes for the purification of FDCA.
Claims30
A process for producing a purified 2,5-furandicarboxylic acid (FDCA) pathway product comprising:
- contacting an FDCA pathway product comprising FDCA and 5-formylfurancarboxylic acid (FFCA) with hydrogen in the presence of a heterogeneous reduction catalyst and a solvent under conditions, which form a reaction mixture for reducing the FFCA to hydroxymethylfurancarboxylic acid (HMFCA), producing a purified FDCA pathway product, and crystallizing the purified FDCA product;
- wherein the purified FDCA pathway product comprises FDCA and HMFCA;
- wherein the solvent is a multi-component solvent comprising water and an aprotic organic solvent;
- and
- wherein the heterogeneous reduction catalyst comprises a solid support and a metal.
2 more elements
A mixture comprising:
- a purified 2,5-furandicarboxylic acid (FDCA) pathway product comprising FDCA, HMFCA, and less than 10% molar impurities of FFCA;
- a heterogeneous reduction catalyst comprising a solid support;
- and
- a multi-component solvent comprising water and an aprotic organic solvent.
1 more element
Dependencies are inferred from the claim text.