Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6809224 | Method for the separation of formaldehyde from a reaction mixture containing polyols by the addition of solvents before and/or during the distillation | Detlef Kratz, Achim Stammer, Gerhard Schulz | 2004-10-26 |
| 6787677 | Hydrogenation of carbonyl compounds | Michael Koch, Steffen Maas, Wolfgang Jürgen Pöpel | 2004-09-07 |
| 6692616 | Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation | Detlef Kratz, Achim Stammer, Harald Rust, Gerhard Schulz | 2004-02-17 |