Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7309804 | Process for purifying 1,2-dichloroethane | Helmut Grumann, Manfred Stoger, Jurgen Eichler, Dieter Jaculi, Arend Greve +3 more | 2007-12-18 |
| 5047377 | Process for the purification and recovery of the contaminated solution of the catalyst produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether | Heinz Erpenbach, Eitel Goedicke, Heribert Tetzlaff | 1991-09-10 |
| 5002914 | Process for purifying and recovering the contaminated catalyst solution arising in the carbonylation of methanol and/or methyl acetate and/or dimethyl ether | Heinz Erpenbach, Norbert Weferling, Peter Prinz | 1991-03-26 |
| 4985383 | Process for removing metallic corrosion products from a contaminated catalyst solution produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether | Heinz Erpenbach, Andreas Seidel, Peter Prinz | 1991-01-15 |
| 4746640 | Process for purifying and recovering catalyst solution contaminated during the carbonylation of methyl acetate and/or dimethylether | Heinz Erpenbach, Klaus Gehrmann | 1988-05-24 |
| 4664753 | Process for separating iodine and its compounds from the carbonylation products obtained by subjecting dimethylether, methyl acetate or methanol to a carbonylation reaction | Heinz Erpenbach, Klaus Gehrmann, Peter Prinz | 1987-05-12 |
| 4629711 | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Heinz Erpenbach, Klaus Gehrmann, Peter Prinz | 1986-12-16 |
| 4557760 | Process for recovering noble metals belonging to group VIII of the Periodic System of the elements from a contaminated catalyst solution originating from the carbonylation of methyl acetate and/or dimethylether | Heinz Erpenbach, Klaus Gehrmann, Peter Prinz | 1985-12-10 |
| 4556644 | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Heinz Erpenbach, Klaus Gehrmann, Peter Prinz | 1985-12-03 |
| 4543217 | Process for making carboxylic acid halides | Heinz Erpenbach, Klaus Gehrmann, Peter Prinz | 1985-09-24 |
| 4444624 | Process for separating acetone from carbonylation mixtures | Heinz Erpenbach, Klaus Gehrmann, Peter Prinz | 1984-04-24 |
| 4442304 | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Heinz Erpenbach, Klaus Gehrmann, Peter Prinz | 1984-04-10 |
| 4440570 | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Heinz Erpenbach, Klaus Gehrmann, Peter Prinz | 1984-04-03 |
| 4414160 | Process for making carboxylic acid halides | Heinz Erpenbach, Klaus Gehrmann, Peter Prinz | 1983-11-08 |
| 4352761 | Production of acetyl chloride | Heinz Erpenbach, Klaus Gehrmann, Peter Pring | 1982-10-05 |
| 4280010 | Continuous production of alkyl acrylates free from ether | Heinz Erpenbach, Klaus Gehrmann, Hans-Klaus Kubbeler | 1981-07-21 |
| 4252983 | Production of acetic anhydride and acetic acid from acetaldehyde | Heinz Erpenbach, Klaus Gehrmann, Alfred Hauser, Kurt Karrenbauer | 1981-02-24 |