Process for producing methylenebis(cyclohexylamine)

Abstract

The present invention provides a process for producing methylenebis(cyclohexylamine), comprising the steps of 1) catalytically hydrogenating MDA, 2) removing the catalyst and 3) subsequently distilling the product of the hydrogenation, in which at least one dividing-wall column is used in step 3). Exposure to high temperature and residence time of the product is reduced and problems due to crystallization do not occur. The methylenebis(cyclohexylamine) isomer ratio also may remain largely constant during the distillation.

Dependencies are inferred from the claim text.