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PROCÉDÉ DE PRODUCTION DE DIALKYL-FURAN-2,5-DICARBOXYLATE PURIFIÉ PAR SÉPARATION PHYSIQUE ET PAR SÉPARATION SOLIDE/LIQUIDE
PROCÉDÉ DE PRODUCTION DE DIALKYL-FURAN-2,5-DICARBOXYLATE PURIFIÉ PAR SÉPARATION PHYSIQUE ET PAR SÉPARATION SOLIDE/LIQUIDE
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摘要
A process to produce a purified dimethyl-furan-2,5-dicarboxylate (DMFD) by feeding furan dicarboxylic acid and methanol to an esterification zone to generate a crude diester composition, and purifying the crude diester composition with a physical separation process followed by crystallization, solid liquid separation, and optionally drying to produce a purified DMFD composition. A portion of the stream generated by solid liquid separation can be dissolved and subjected to crystallization and solid liquid separation repeatedly. The process is useful to produce a purified DMFD composition having a low b*, at least 98 wt.% DAFD solids, and a low concentration of 5-(methoxycarbonyl)furan-2-carboxylic acid (MCFC) and methyl 5-formylfuran-2-carboxylate (MFFC).
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