Process and intermediates for the production of furan-2,5-dicarboxylic acid or derivatives thereof
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United States of America Patent
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Jun 28, 2016
Grant Date -
Mar 17, 2016
app pub date -
May 8, 2014
filing date -
May 8, 2013
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Abstract
Disclosed is a method of making 5-formyl-2-furoic acid and furan-2,5-dicarboxylic acid. The method involves the use of 5-keto-aldonic acids as intermediates, as these can be subjected to ring formation by a cyclodehydration reaction under mild conditions. The 5-formyl-2-furoic acid or carboxylic derivative thereof is subjected to oxidation so as to form furan-2,5-dicarboxylic acid. The 5-keto-aldonic acid intermediates can be obtained by isomerization of uronic acids which can be obtained from sugar beet pulp, chicory pulp, fruit peals including orange peels, or non-terrestrial sources like seaweeds. A preferred source is sugar beet pulp.
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