Evonik Degussa Gmbh

Michael D Hinton

Armin Matthias Rix

Martina Ortelt

Gerda Grund

Axel Hengstermann

Christian Lettmann

Robert Jansen

Matthias Orschel

Joerg-Joachim Nitz

Guido Streukens

Markus Schwarz

Cord Knoop

Martin Maier

Markus Galle

Juergen Lippe

Rolf Hirsch

Norbert Richter

The invention relates to an improved process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine, referred to hereinafter as isophoronediamine or, in abbreviated form, IPDA, by: I. preparation of isophorone by catalyzed aldol condensations with acetone as reactant; II. reaction of isophorone with HCN to form isophoronenitrile (IPN, 3-cyano-3,5,5-trimethylcyclohexanone); III. catalytic hydrogenation and/or catalytic reductive amination (also referred to as aminative hydrogenation) of 3-cyano-3,5,5-trimethylcyclohexanone, hereinafter called isophoronenitrile or, in abbreviated form, IPN, to give the isophoronediamine.

Process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexylamine

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Theodore, AL, United States of America

Michael D Hinton