Evonik Degussa Gmbh

Evonik Industries Ag

Jens Doering

Harald Haeger

Martin Roos

Ralf Meier

Juergen Herwig

Luca Cameretti

Stephan Kohlstruk

Axel Hengstermann

Robert Jansen

Matthias Orschel

Joerg-Joachim Nitz

Michael Demming

Anja Mueller

Andreas Merkel

Matthias Mendorf

Andreas Hoff

Cyclododecanone (CDON) is prepared by epoxidizing cyclododecene (CDEN) to epoxycyclododecane (CDAN epoxide), and rearranging the CDAN epoxide to CDON to obtain a mixture comprising said CDON and cyclododecane (CDAN), wherein CDAN is separated from the CDON-containing mixture and oxidized to CDON.

Process for preparing cyclododecanone

Cyclododecanone (CDON) is prepared by epoxidizing cyclododecene (CDEN) to epoxycyclododecane (CDAN epoxide), and rearranging the CDAN epoxide to CDON to obtain a mixture comprising said CDON and CDEN, wherein CDEN is separated from the CDON-containing mixture and sent to the epoxidation to CDAN epoxide in step a.

A process for preparing isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) is provided wherein distillation vapors from the work-up of product fractions are recycled to earlier stages of operation of the process.

Hydrolysis of the residues obtained in the production of isophorone to recover isophorone and acetone

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Dortmund, Germany

Jens Doering