| 7696360 |
Method for the separation of ascorbic acid from a polar solvent containing ascorbic acid and 2-keto-L-gulonic acid |
Gerd Kaibel, Martin Merger, Thomas Domschke, Petra Deckert |
2010-04-13 |
| 7241365 |
Material for a facility for the production of anhydrous formic acid |
Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +2 more |
2007-07-10 |
| 6867329 |
Waste water treatment in a method for producing formic acid which is free of water |
Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +1 more |
2005-03-15 |
| 6841700 |
Method for producing anhydrous formic acid |
Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +1 more |
2005-01-11 |
| 6838579 |
Utilization of an extracting agent as antifoaming agent in the production of anhydrous formic acid |
Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +2 more |
2005-01-04 |
| 6777503 |
Method for hydroformylating olefins having between 20 and 400 carbon atoms |
Harald Schwahn, Gerhard Borchert, Klaus Diehl, Armin Volker Grenacher |
2004-08-17 |
| 6696603 |
Method for cleaning off-gas flows |
Heinz Auer, Bernd Bessling, Hans Hammer, Hans Hasse, Maximilian Vicari +2 more |
2004-02-24 |
| 6331656 |
Hydroformylation process |
Heinrich-Josef Blankertz, Armin Volker Grenacher, Harald Schwahn, Willi Schönmann, Michael Roper |
2001-12-18 |
| 5481041 |
Isolation of triphenylphosphine |
Peter Lechtken, Matthias Fankhaenel, Dieter Hermeling |
1996-01-02 |
| 4961827 |
Obtaining very pure maleic anhydride from crude maleic anhydride |
Dieter Zimmerling, Johannes E. Schmidt, Rolf Seubert, Karl Fischer |
1990-10-09 |
| 4294666 |
Process for the manufacture of 4,4'-diphenyl-methane diisocyanate and a mixture of diphenyl-methane diisocyanate isomers containing a small amount of uretdiones and hydrolyzable chlorine |
Hans J. Astheimer, Horst Brandtstaedter, Rainer Ohlinger, Willy van Pee, Jaak Van Steen +2 more |
1981-10-13 |
