Evonik Degussa Gmbh

Martin Maier

Robert Jansen

Matthias Orschel

Joerg-Joachim Nitz

Markus Schwarz

Gerda Grund

Axel Hengstermann

Armin Matthias Rix

Martina Ortelt

Manfred Kreczinski

Christian Lettmann

Jörg-Joachim Nitz

Guido Streukens

Cord Knoop

Matthias Woyciechowski

Markus Galle

Juergen Lippe

Yue Chang

Michael D Hinton

Rolf Hirsch

Norbert Richter

Treatment of the wastewater from isophorone production comprising neutralization, filtration and a downstream chemical oxidation process and subsequent reduction. The invention relates to treatment of the wastewater from isophorone (IP) production comprising neutralization, filtration and a downstream chemical oxidation process and subsequent reduction.

Treatment of the wastewater from isophorone production comprising neutralization, filtration and a downstream chemical oxidation process and subsequent reduction

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

The invention relates to a method for producing isophorone by catalyzed aldol condensation of acetone as an educt, reprocessing the reaction product, hydrolyzing the product stream, and separating into an organic and an aqueous fraction, obtaining isophorone from the organic fraction, distillatively reprocessing the aqueous fraction, and feeding the vapors from the head of the distillative reprocessing apparatus into the hydrolysis apparatus.

Method for producing isophorone

The invention relates to a process for preparing isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) in the presence of at least one defoamer in the wastewater column in the workup section.

Process for preparing isophorone in the presence of at least one defoamer in the wastewater column in the workup section

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Herne, Germany

Martin Maier