Process for working-up aqueous amine solutions

Details Process for working-up aqueous amine solutions Process for working-up aqueous amine solutions

B - Operations, Transporting

01

D

202/105

B01D 3/00 (2006.01) C07C 209/36 (2006.01) C07C 209/86 (2006.01)

Patent

CA 1292721

A PROCESS FOR WORKING-UP AQUEOUS AMINE SOLUTIONS ABSTRACT OF THE DISCLOSURE An amine is separated from an aqueous solution of amine and volatile organic compounds by distillation in a column. The vapors generated during distillation are condensed. The liquid remaining in the column is then passed into a separating device in which the volatile organic compounds are removed in vapor form. The liquid remaining in the separating device is then fed to the head of the distillation column. Water is removed from the column in a sidestream and diamine is the residue. This process is particularly effective in recovering aromatic diamines from solutions which accumulate during hydrogenation of dinitro aromatic compounds.

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