PREPARATION OF DIALKYL ESTERS OF 2,5-FURANDICARBOXYLIC ACID

摘要

Dialkyil esters of 2,5-furandicarboxylic acid are prepared in a process comprising: - contacting an acid starting composition comprising 2,5-furandicarboxylic acid with an excess of alkanol to form an esterification product comprising 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 comprising the dialkyil ester of 2,5-furandicarboxylic acid; and - subjecting at least part of the solid crude product composition to an evaporation step, wherein the dialkyil ester of 2,5-furandicarboxylic acid is evaporated and subsequently condensed to yield purified dialkyil ester of 2,5-furandicarboxylic acid.