Issued Patents All Time
Showing 51–75 of 77 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6274744 | Preparation of alkali metal salts of L-ascorbic acid | Wolfram Burst, Andreas Böttcher, Veronique Kessler, Thomas Kuntze | 2001-08-14 |
| 6262317 | Process for preparing 1,4-butanediol by catalytic hydrogenation of 1,4-butinediol | Rainer Becker, Franz Josef Brocker, Rolf Pinkos, Joachim Wulff-Doring | 2001-07-17 |
| 6214172 | Preparation of methylglyoxal dimethyl acetal | Carsten Groning, Klaus Ebel, Jörg Therre, Jurgen Koopmann, Helmuth Menig +2 more | 2001-04-10 |
| 6211114 | Catalyst and process for preparing 2-buten-1-ol compounds | Franz Josef Brocker, Werner Aquila, Klemens Flick, Ernst Langguth | 2001-04-03 |
| 6175044 | Preparation of citral | Jörg Therre, Werner Aquila, Günter Wegner, Hartwig Fuchs | 2001-01-16 |
| 6150564 | Selective liquid-phase hydrogenation of .alpha.,.beta.-unsaturated carbonyl compounds | Franz Josef Brocker, Werner Aquila, Hartwig Fuchs, Günter Wegner, Manfred Stroezel | 2000-11-21 |
| 6054628 | Reacting Grignard compounds with carbonyl compounds and ensuing hydrolysis | Manfred Stroezel, Udo Rheude, Ralf-Thomas Rahn | 2000-04-25 |
| 6013842 | Preparation of glyoxal monoacetals | Carsten Groning, Jörg Therre, Klaus Ebel | 2000-01-11 |
| 5965751 | Process for hydrogenation of dihydrofurans to give tetrahydrofurans | Franz Josef Brocker, Rolf Fischer, Rolf Pinkos | 1999-10-12 |
| 5939589 | Process and reactor for carrying out conversion with catalysts suspended in liquids | Franz Josef Brocker, Manfred Stroezel | 1999-08-17 |
| 5914012 | Dividing wall column for continuous fractionation of multicomponent mixtures by distillation | Manfred Stroezel, Udo Rheude | 1999-06-22 |
| 5897748 | Distillative separation of mixtures and apparatus for this purpose | — | 1999-04-27 |
| 5785819 | Distillation column for separating a liquid mixture into a plurality of pure fractions | Manfred Stroezel, Joachim Pfeffinger | 1998-07-28 |
| 4994152 | Removal of small amounts of a medium-boiling fraction from a liquid mixture by distillation | Karl Schloemer, Hans-Horst Mayer | 1991-02-19 |
| 4908477 | Removal of organic iodine compounds from carbonylation products of methanol methyl acetate and dimethyl ether | Horst Hartmann, Waldhelm Hochstein, Franz Mueller | 1990-03-13 |
| 4859286 | Isolation of 1,3-butadiene | Werner Hefner, Peter Keller, Werner Drewitz | 1989-08-22 |
| 4720327 | Distillative separation of liquid mixtures of substances | Werner Aquila, Axel Nissen, Michael Horner, Walter Rebafka | 1988-01-19 |
| 4659866 | Continuous preparation of furmamide | Kaspar Bott, Herwig Hoffmann, Rudolf Irnich, Otto Kratzer | 1987-04-21 |
| 4551208 | Recovery of formic acid by distillation | Kaspar Bott, Horst Hartmann, Rudolf Irnich, Horst Buelow | 1985-11-05 |
| 4399001 | Separating off organic iodine compounds from acetaldehyde-free carbonylation products of methanol, methyl acetate and dimethyl ether | Horst Hartmann, Waldhelm Hochstein, Franz Mueller | 1983-08-16 |
| 4388154 | Isolation of acetaldehyde and methanol from reaction mixtures resulting from the homologization of methanol | Waldheim Hochstein, Franz Mueller, Horst Hartmann | 1983-06-14 |
| 4383894 | Removal of organic iodine compounds from acetaldehyde | Horst Hartmann, Waldhelm Hochstein, Franz Mueller | 1983-05-17 |
| 4383893 | Distillative separation of liquid mixtures containing aliphatic alcohols | Horst Hartmann, Waldhelm Hochstein, Franz Mueller | 1983-05-17 |
| 4370491 | Continuous preparation of acetic acid esters | Kaspar Bott, Herwig Hoffmann, Rudolf Irnich, Eberhard Schaefer | 1983-01-25 |
| 4326073 | Production of anhydrous or substantially anhydrous formic acid | Dieter Wolf, Rudolf Schmidt, Ulrich Block, Hartmut Schoenmakers, Kaspar Bott | 1982-04-20 |