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Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates |
Sven Titlbach, Andreas KUSCHEL, Carlos LIZANDARA, Stephan Schunk, Joerg ROTHER +6 more |
2025-09-16 |
| 11512046 |
Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates |
Sven Titlbach, Andreas KUSCHEL, Carlos LIZANDARA, Stephan Schunk, Joerg ROTHER +6 more |
2022-11-29 |
| 10435354 |
Process for preparing isocyanates in dialkyl carbonates as solvent |
Manfred Heilig, Thomas Schulz, Torsten Mattke, Filip Nevejans, Kai Thiele |
2019-10-08 |
| 10093615 |
Process for preparing isocyanates in dialkyl carbonates as solvent |
Manfred Heilig, Thomas Schulz, Torsten Mattke, Filip Nevejans, Kai Thiele |
2018-10-09 |
| 8829232 |
Process for preparing aromatic isocyanates |
Ulrich Penzel, Torsten Mattke, Andreas Wölfert, Johannes Jacobs, Tsung-Chieh Cheng +6 more |
2014-09-09 |
| 8772535 |
Process for preparing isocyanates |
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2014-07-08 |
| 8614356 |
Method for producing toluylenediamine by hydrogenating dinitrotoluene |
Joana Coelho Tsou, Steffen Oehlenschlaeger, Ekkehard Schwab, Wolfgang Mackenroth, Hartwig Voss +3 more |
2013-12-24 |
| 8212069 |
Process for preparing isocyanates |
Ralf Boehling, Sven Kueber, Eckhard Stroefer, Jochem Henkelmann, Georg Krug +1 more |
2012-07-03 |
| 7875740 |
Iron-containing material suitable for use as hydrogenation catalyst |
Andreas Ansmann, Christoph Benisch, Peter Baβler, Rolf Fischer, Johann-Peter Melder +1 more |
2011-01-25 |
| 7501047 |
Method for purifying caprolactam |
Hermann Luyken, Andreas Ansmann, Christoph Benisch, Peter Baβler, Rolf Fischer +1 more |
2009-03-10 |
| 7385073 |
Method for reducing the content of an unsaturated amine in a mixture containing an amino nitrile, a diamine, a dinitrile or mixtures thereof |
Christoph Benisch, Hermann Luyken, Peter Baβler, Rolf Fischer, Johann-Peter Melder +1 more |
2008-06-10 |
| 7342134 |
Method for the distillative recovery of toluylenediamine |
Carsten Knoesche, Martin Sohn, Ulrich Penzel, Hans-Juergen Pallasch, Gunter Georgi +4 more |
2008-03-11 |
| 7217818 |
Purification of caprolactam |
Rolf Fischer, Hermann Luyken, Andreas Ansmann, Peter Bassler, Christoph Benisch +1 more |
2007-05-15 |
| 7115781 |
Iron-containing oxidic material suitable for use as hydrogenation catalyst precursor |
Andreas Ansmann, Christoph Benisch, Peter Bassler, Rolf Fischer, Johann-Peter Melder +1 more |
2006-10-03 |
| 6896772 |
Method for separating ammonia from solutions containing caprolactam and ammonia |
Hermann Luyken, Frank Ohlbach, Rolf Fischer, Johann-Peter Melder, Peter Bassler +1 more |
2005-05-24 |
| 6878798 |
Method for producing a polymer, using caprolactam |
Frank Ohlbach, Helmut Winterling, Andreas Ansmann, Rolf Fischer, Johann-Peter Melder +2 more |
2005-04-12 |
| 6828457 |
Method for reducing the content of an unsaturated amine in a mixture containing an amine and a nitrile |
Frank Ohlbach, Christoph Benisch, Hermann Luyken, Andreas Ansmann, Rolf Fischer +2 more |
2004-12-07 |
| 6686465 |
Preparation of cyclic lactams |
Frank Ohlbach, Andreas Ansmann, Peter Bassler, Rolf Fischer, Hermann Luyken +1 more |
2004-02-03 |
| 6683178 |
Preparation of cyclic lactams |
Frank Ohlbach, Andreas Ansmann, Peter Bassler, Rolf Fischer, Hermann Luyken +1 more |
2004-01-27 |
