| 4568427 |
Continuous isolation of phthalic anhydride and maleic anhydride from reaction gases |
Eckehard Danz, Gerd Dumbgen, Ernest Miesen, Johannes E. Schmidt |
1986-02-04 |
| 4489775 |
Desublimator for isolating sublimation products from reaction gases |
Harry Kassat, Joachim Wagner |
1984-12-25 |
| 4411818 |
Reactivation of vanadium-containing oxidation catalysts |
Peter Reuter, Kurt Blechschmitt |
1983-10-25 |
| 4369327 |
Preparation of phthalic anhydride |
Dieter Stockburger, Wilhelm Schultz, Johannes E. Schmidt, Herwig Hoffmann, Bernhard Holzknecht +1 more |
1983-01-18 |
| 4324694 |
Supported catalysts containing vanadium pentoxide, titanium dioxide, phosphorus, rubidium and/or cesium, with or without zirconium dioxide |
Peter Reuter, Kurt Blechschmitt |
1982-04-13 |
| 4282116 |
Supported catalyst containing vanadium and titanium and/or zirconium for the preparation of phthalic anhydride |
Peter Reuter, Kurt Blechschmitt |
1981-08-04 |
