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AssigneeSynvina C.V.
InventorsAna Sofia Vagueiro De Sousa Dias, Benjamin McKay, Victor Peter Charles Vreeken, Gerardus Johannes Maria Gruter, Johannes Maria Franciscus Sijben
Estimating the term…
Dialkyil esters of 2,5-furandicarboxylic acid are prepared in a process including: contacting an acid starting composition having 2,5-furandicarboxylic acid with an excess of alkanol to form an esterification product having the dialkyil ester of 2,5-furan dicarboxylic acid, water and unreacted alkanol; separating at least part of the unreacted alkanol and water from the esterification product to yield a solid crude product composition having the dialkyil ester of 2,5-furandicarboxylic acid; and subjecting at least part of the solid crude product composition to an evaporation step, where the dialkyil ester of 2,5-furandicarboxylic acid is evaporated and subsequently condensed to yield purified dialkyil ester of 2,5-furandicarboxylic acid.
A process for the preparation of the dialkyl esters of 2,5-furandicarboxylic acid which process comprises
An ester composition comprising dialkyl ester of 2,5-furandicarboxylic acid wherein the composition comprises 99 to 99.9% wt of dialkyl ester of 2,5-furandicarboxylic acid and 1 to 0.1% wt of monoalkyl ester of 2,5-furandicarboxylic acid, the percentages being based on the composition, and which composition has a color of at most 0.005, as measured by absorbance of a 30 mg/L solution in DMSO at a wavelength of 400 nm.
Dependencies are inferred from the claim text.