Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11034631 | Method for obtaining pure 1,3-butadiene | Tobias Keller, Jan-Oliver Weidert | 2021-06-15 |
| 10968152 | Simplified process for isolating pure 1,3-butadiene | Tobias Keller | 2021-04-06 |
| 10569192 | Distillation device comprising a column which as three or a plurality of cells in series through which fluid flows and method for distilling or extractive distillation by use of the distillation device | Norbert Asprion, Jan-Oliver Weidert, Ortmund Lang | 2020-02-25 |
| 10125063 | Column with separative installations for separating a mixture of hydrocarbons and/or hydrocarbon derivatives by means of an extractive distillation using a selective solvent | Julia Hofinger, Peter Renze | 2018-11-13 |
| 8766029 | Process for providing a vaporous purified crude C4 cut as a feed steam for an extractive distillation with a selective solvent | Randolf Hugo | 2014-07-01 |
| 8642828 | Process for purifying a recycle stream from a 1,3-butadiene processing plant | Randolf Hugo | 2014-02-04 |
| 8361280 | Process for distillatively obtaining pure 1,3-butadiene from crude 1,3-butadiene | Uwe Stabel, Harry Zachmann, Eberhardt Gaffron, Michael Jäger | 2013-01-29 |
| 7692053 | Process for obtaining crude 1,3-butadiene from a C4 cut | — | 2010-04-06 |
| 7619126 | Method for obtaining crude 1,3-butadiene from a C4 fraction | — | 2009-11-17 |
| 7556717 | Method and device for extractive distillation | — | 2009-07-07 |
| 7557257 | Method for the separation of a crude C4 cut | — | 2009-07-07 |
| 7462277 | Continuous method for separating a C4 cut | Till Adrian, Thomas Hill, Klaus Kindler | 2008-12-09 |
| 7432411 | Continuous method for obtaining butenes from a C4 fraction | Till Adrian, Klaus Kindler | 2008-10-07 |
| 7393992 | Method for working up crude 1,3-butadiene | Thomas Hill, Klaus Kindler | 2008-07-01 |
| 6166248 | Process for the separation of acrylic acid | Fritz Thiessen, Ulrich Hammon, Albrecht Dams | 2000-12-26 |
| 4902828 | Recovery of aqueous glyoxylic acid solutions | Gerhard Wickenhaeuser, Fritz Graf, Leopold Hupfer | 1990-02-20 |
| 4521632 | Purification of aqueous glyoxal solutions | Gerhard Wickenhaeuser, Fritz Graf, Leopold Hupfer | 1985-06-04 |