| 8092655 |
Dividing wall column for fractionation of a multicomponent mixture |
Horst Hartmann, Gerd Kaibel, Guido Harms |
2012-01-10 |
| 6617463 |
Method for the production of L-ascorbic acid by lactonization of 2-keto-L-gulonic acid or s2-keto-L-gulonate esters |
Andreas Böttcher |
2003-09-09 |
| 6573400 |
Preparation of 2-keto-L-gulonic esters |
Andreas Böttcher |
2003-06-03 |
| 6554965 |
Rectification column for isolating pure substances from high boiling air-and/or temperature sensitive substances |
Horst Hartmann, Wulf Kaiser, Harald Laas, Paul Grafen, Bernhard Bockstiegel +1 more |
2003-04-29 |
| 6461482 |
Process for preparing high-purity phytantriol |
Harald Streicher, Jürgen Däuwel, Jürgen Koppenhöfer |
2002-10-08 |
| 6274744 |
Preparation of alkali metal salts of L-ascorbic acid |
Gerd Kaibel, Andreas Böttcher, Veronique Kessler, Thomas Kuntze |
2001-08-14 |
| 6111117 |
Process for isolation of pure substances from mixtures of high-boiling air and/or temperature-sensitive substances which require a high separation efficiency by rectification under medium vacuum, and columns suitable for this process |
Horst Hartmann, Wulf Kaiser, Harald Laas, Paul Grafen, Bernhard Bockstiegel +1 more |
2000-08-29 |
| 5994589 |
Process for preparing 2,5,6-trimethyl-2-cyclohexen-1-one |
Detlef Ruff, Wulf Kaiser, Manfred Stroezel |
1999-11-30 |
| 5950454 |
Cloth or cloth-like packing which is subject to low pressure losses and has an ordered structure for use in material-exchange columns and rectification method using such packing |
Horst Hartmann, Wulf Kaiser, Harald Laas, Paul Grafen, Bernhard Bockstiegel +1 more |
1999-09-14 |
| 5773635 |
Preparation of polyenecarbonyl compounds having a high content of the all-E isomer, and of their acetals or ketals |
Walter Dobler, Wolfgang Krause, Joachim Paust, Otto Worz, Udo Rheude +8 more |
1998-06-30 |
| 4661610 |
Preparation of veratryl cyanide |
Josef Muller, Walter-Wielant Wiersdorff, Heinz Dralle, Ernst Schaffner, Rolf Steinkamp |
1987-04-28 |
