Process for producing 2-(2,2,6,6-tetramethylpiperidin-4-yl)propane-1,3-diamine

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United States of America Patent

PATENT NO 9868702
SERIAL NO

15605268

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Abstract

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A process for producing 2-(2,2,6,6-tetramethylpiperidin-4-yl)propane-1,3-diamine by A) reacting triacetonamine (TAA) and malononitrile to afford the intermediate 2-(2,2,6,6-tetramethylpiperidin-4-ylidene)malononitrile, and B) hydrogenating 2-(2,2,6,6-tetramethylpiperidin-4-ylidene)malononitrile in the presence of at least one catalyst. In another embodiment, the hydrogenation in step B) of the process is performed at 20-120° C. and at 20-300 bar. In another embodiment, the hydrogenation in step B) of the process is performed in two stages at 20-120° C. and at 20-300 bar.

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Patent Owner(s)

Patent OwnerAddress
EVONIK DEGUSSA GMBHESSEN ESSEN NORTH RHINE-WESTPHALIA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Demming, Michael Dülmen, DE 6 45
Fuchsmann, Dirk Haltern am See, DE 21 171
Kohlstruk, Stephan Gladbeck, DE 59 522
Nitz, Jörg-Joachim Essen, DE 11 99
Ortelt, Martina Flein, DE 29 244
Ott, Denise Marl, DE 5 44
Rüfer, Alexander Martin Recklinghausen, DE 13 120
Rittsteiger, Anne Olfen, DE 17 129
Stasch, Anja Recklinghausen, DE 4 40
Stemmer, Christine Marl, DE 5 44

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