Process for the purification of cycloalkanone mixtures...

Details Process for the purification of cycloalkanone mixtures... Process for the purification of cycloalkanone mixtures...

C - Chemistry, Metallurgy

07

C

260/588.5

C07C 45/78 (2006.01) C07C 45/85 (2006.01)

Patent

CA 1123457

ABSTRACT OF THE DISCLOSURE Aldehydes are removed by aldol condensation from a mixture containing a C5-C12 ring atom cycloalkanone, aldehydes and corresponding cycloalkyl esters of C4 or greater carboxylic acids, the mix- ture resulting from the liquid phase oxidation of the corresponding cycloalkane with molecular oxygen. The aldol condensation reaction converts at least 80% of the aldehydes present while no more than 20% of the cycloalkyl esters are saponified. A slight excess of no more than 2% of the cycloalkanone required for the aldehyde removal is converted in the aldol condensa- tion. Cycloalkanones thus treated and freed of the aldehyde are processed into polylactams exhibiting particularly high mechanical strengths.

332513

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