| 5714644 |
Process and catalyst for the selective hydrogenation of butynediol to butenediol |
Matthias Irgang, Volkmar Menger, Ernest Miesen, Peter Stops |
1998-02-03 |
| 4902828 |
Recovery of aqueous glyoxylic acid solutions |
Gerhard Wickenhaeuser, Bernd Heida, Leopold Hupfer |
1990-02-20 |
| 4851584 |
Preparation of carbonyl compounds |
Leopold Hupfer, Harald Schultheiss |
1989-07-25 |
| 4814513 |
Preparation of carbonyl compounds |
Heinz Engelbach, Leopold Hupfer, Harald Schultheiss, Michael Jolyon Sprague |
1989-03-21 |
| 4728435 |
Decolorization of aqueous glyoxal solutions |
Guenther Mueller, Rolf Ramsteiner, Leopold Hupfer |
1988-03-01 |
| 4698434 |
Preparation of hydroxymethylimidazoles |
Leopold Hupfer |
1987-10-06 |
| 4521632 |
Purification of aqueous glyoxal solutions |
Gerhard Wickenhaeuser, Bernd Heida, Leopold Hupfer |
1985-06-04 |
| 4450277 |
Preparation of 1-substituted imidazoles |
Leopold Hupfer |
1984-05-22 |
| 4377696 |
Preparation of 4-methylimidazoles |
— |
1983-03-22 |
