| 6888006 |
Method for processing pyrollidone and n-vinyl pyrollidone residues |
Herbert Helfert, Gerhard Laqua, Ulrich Eiden, Stephan Scholl, Christoph Übler |
2005-05-03 |
| 6703511 |
Method for obtaining pure n-vinyl pyrrolidone |
Bernd Eck, Jorg Heilek, Herbert Helfert |
2004-03-09 |
| 6201160 |
Preparation of alcohols |
Martin Brudermuller, Matthias Irgang, Franz Merger, Tom Witzel, Detlef Kratz +5 more |
2001-03-13 |
| 5948945 |
Prevention of spontaneous decomposition of gaseous acetylene |
Rudolf Erich Lorenz, Herbert Helfert, Hans-Peter Schildberg, Gunter Saladin |
1999-09-07 |
| 5726321 |
Process for carrying out gas/liquid reactions under avoidance of a continuous gas phase |
Klaus Bittins, Marc Heider, Jochen Kellenbenz, Kurt Josef Wagner, Peter Zehner +1 more |
1998-03-10 |
| 5723685 |
Preparation of monovinyl ethers |
Marc Heider, Thomas Ruhl, Herbert Helfert, Jochem Henkelmann |
1998-03-03 |
| 5710284 |
Purification of N-vinylpyrrolidone by crystallization |
Herbert Helfert, Bernd Eck, Bernhard Maltry |
1998-01-20 |
| 5683555 |
Working up reaction mixtures obtained in addition reactions with acetylene or propyne |
Marc Heider, Michael Karcher, Albrecht Dams |
1997-11-04 |
| 5670639 |
Preparation of n-vinyllactams |
Marc Heider, Albrecht Dams, Harald Rust |
1997-09-23 |
| 5380919 |
Preparation of neopentyl glycol hydroxypivalate |
Franz Merger |
1995-01-10 |
| 5304685 |
Preparation of 3-(hydroxyphenyl)propionaldehydes and their hydrogenation to 3-(hydroxyphenyl)propanols |
Franz Merger |
1994-04-19 |
| 5254752 |
Preparation of 4-halobenzyl alcohols |
Franz Merger, Martin Brudermueller |
1993-10-19 |
| 5254757 |
Preparation of 2,2-bis-hydroxymethyl-butanediol-(1,4) |
Franz Merger |
1993-10-19 |
