Basf Se Corporation

Beatrice Rössler-Feigel

Johann-Peter Melder

Joaquim Henrique Teles

Boris Breitscheidel

Wolfgang Rohde

Martin Ernst

Wilhelm Ruppel

Dieter Baumann

Ulrike Wegerle

Stefan Bitterlich

Kirsten Dahmen

Anton Meier

Michael Limbach

Wolfgang Gerlinger

Peter Resch

Christian Müller

Piotr Makarczyk

Kerstin Mühlheims

Hans-Günter Wagner

In a process for workup of a crude ester comprising esterification catalyst hydrolysis product in suspended particulate form, a) the crude ester is admixed in an emulsifying tank with 1% to 10% by weight of water and the water is emulsified in the crude ester to obtain a suspoemulsion, b) the suspoemulsion from the emulsifying tank is transferred to an agglomerating tank containing an initial charge of water-undersaturated crude ester, such that a water content below the solubility limit of water in the crude ester is established in the mixture of the suspoemulsion and the initial charge of crude ester, as a result of which the suspended particulate esterification catalyst hydrolysis products form stable agglomerates, and c) the agglomerates formed are filtered off.

Process for workup of a crude ester comprising esterification catalyst hydrolysis product in suspended particulate form

The present invention relates to a process for preparing a cyclic diamine, comprising the reaction of at least one cyclic alkene with a gas mixture (G) comprising dinitrogen the subsequent conversion of monoxide to give at least one cyclic ketone and then converting the at least one cyclic ketone to a cyclic diamine. The invention also relates to the use of a cyclic diamine with primary and secondary amine functions thus obtained to prepare polyamides and polyurethanes.

Process for preparing cyclic diamines

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Weisenheim am Sand, Germany

Beatrice Rössler-Feigel