7259-78-1Relevant articles and documents
PROCESS FOR PREPARING ε- EPSILON-CAPROLACTONE AND 1,6- HEXANEDIOL
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Page/Page column 19-21, (2012/04/10)
The invention relates to processes for preparing 1,6-hexanediol and very pure ε-caprolactone from a dicarboxylic acid solution (DCS), comprising the steps of (a) esterification of the DCS with alcohols, (b) partial catalytic hydrogenation of the esters, (c) distillative removal of 1,6- hexanediol and low boilers as the top product, and (d) cyclization of the 6-hydroxycaproic ester present in the bottoms fraction in the presence of a higher-boiling alcohol than caprolactone.