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US 10,947,208 B2Granted
Organotin catalysts in esterification processes of furan-2,5-dicarboxylic acid (FDCA)
AssigneesArcher Daniels Midland Company, Dupont Industrial Biosciences USA, LLC
InventorsKenneth Stensrud, Stuart Fergusson
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Abstract
A method for preparing sugar-based mono and diesters is described. The process entails the esterification of 2,5-furan-dicarboxylic acid (FDCA) with an alcohol in the presence of low loadings of a homogeneous organotin (IV) catalyst.
Claims22
A process of preparing esters of furan-2,5-dicarboxylic acid (FDCA) comprising:
- reacting FDCA with at least an alcohol or a mixture of different alcohols in either an alcohol or diester solvent matrix in the presence of a homogeneous organotin catalyst at a loading level of up to 10 mol. % for a reaction time and temperature sufficient to esterify said FDCA and produce a di-ester species at a FDCA conversion of at least 80 mol. %, and a di-ester yield of at least 5 mol. % greater than a comparable amount of Brønsted acid catalyst.
Dependencies are inferred from the claim text.