| 8546606 |
Method for producing polyisocyanates |
Andreas Brodhagen, Filip Nevejans, Eckhard Stroefer, Andreas Woelfert, Steffen Oehlenschlaeger |
2013-10-01 |
| 8163265 |
Mechanically stable catalyst based on alpha-alumina |
Olga Schubert, Martin Sesing, Lothar Seidemann, Martin Karches, Thomas Grassler |
2012-04-24 |
| 7910517 |
Mechanically stable catalyst based on alpha-alumina |
Olga Schubert, Martin Sesing, Lothar Seidemann, Martin Karches, Thomas Grassler |
2011-03-22 |
| 7851648 |
Method for the continuous production of isocyanates |
Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Rene Leuthold +4 more |
2010-12-14 |
| 7592479 |
Reprocessing of reaction material discharged from phosgenation reactors |
Eckhard Stroefer, Stephan Scholl, Andreas Woelfert, Hans-Juergen Pallasch, Jan Peter Bredehoeft |
2009-09-22 |
| 7584629 |
Separation of a substance mixture consisting of hydrogen chloride and phosgene |
Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Peter Van Den Abeel +3 more |
2009-09-08 |
| 7524405 |
Method for separating out solvent from a reaction mixture resulting from an isocyanate synthesis and for purifying this solvent |
Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Peter Van Den Abeel +3 more |
2009-04-28 |
| 7431804 |
Method for carrying out the distillation or reactive distillation of a mixture containing at least one toxic constituent |
Eckhard Ströfer, Gerd Kaibel, Achim Stammer, Carsten Oost, Manfred Stroezel +1 more |
2008-10-07 |
| 7408083 |
Method for the production of diaminodiarylmethanes |
Ulrich Steinbrenner, Eckhard Stroefer, Veronika Quaschning, Helmut Moehwald, Kai Thiele +3 more |
2008-08-05 |
| 7342134 |
Method for the distillative recovery of toluylenediamine |
Carsten Knoesche, Ulrich Penzel, Hans-Juergen Pallasch, Gunter Georgi, Wolfgang Mackenroth +4 more |
2008-03-11 |
| 7193115 |
Highly concentrated formaldehyde solution, production and reaction thereof |
Eckhard Ströfer, Hans Hasse, Klemens Schilling |
2007-03-20 |
