Issued Patents 2004
Showing 1–2 of 2 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 | Matthias Dernbach, Achim Stammer, Gerhard Schulz | 2004-10-26 |
| 6692616 | Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation | Matthias Dernbach, Achim Stammer, Harald Rust, Gerhard Schulz | 2004-02-17 |