Brehme
Volker Brehme, Nottuln-Appelhuelsen DE
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20090209766 | PROCESS FOR THE PREPARATION OF 4-AMINO-2,2,6,6-TETRAMETHYLPIPERIDINE - 4-amino-2,2,6,6-tetramethylpiperidine is prepared by reacting 2,2,6,6-tetramethylpiperidine-4-one with ammonia and hydrogen in the presence of nickel and/or cobalt catalyst and water. The main reaction is carried out at a pressure of at most 50 bar and a temperature of at most 120° C. up to a conversion of the 2,2,6,6-tetramethylpiperidine-4-one of at least 80%. Then, an after-reaction takes place at a higher temperature and at a higher pressure compared to the pressure and temperature of the main reaction. | 08-20-2009 |
20090287032 | METHOD FOR PRODUCING DIENES BY HYDRODIMERIZATION - The invention relates to a process for preparing substituted or unsubstituted 1,7-diolefins by hydrodimerizing non-cyclic olefins having at least two conjugated double bonds in the presence of a reducing agent and of a catalyst, wherein the catalyst used is a metal-carbene complex. | 11-19-2009 |
Volker Brehme, Nottuln-Appelhulsen DE
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20080296786 | Process for preparing alkali metal alkoxides - The invention relates to a process for preparing an alcoholic solution of an alkali metal alkoxide from alkali metal hydroxide and alcohol in a reaction column, the alcohol and the alkali metal hydroxide being conducted in countercurrent, which is characterized in that a reflux ratio of at least is established in the reaction column. | 12-04-2008 |
Volker Brehme, Nottuln DE
Patent application number | Description | Published |
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20130247758 | AMINE-CONTAINING ABSORPTION MEDIUM, PROCESS AND APPARATUS FOR ABSORPTION OF ACIDIC GASES FROM GAS MIXTURES | 09-26-2013 |
20140243562 | HYDROGENOLYSIS OF FURFURYL ALCOHOL TO 1,2-PENTANEDIOL - The present invention provides a process for preparing 1,2-pentanediol by reacting furfuryl alcohol with hydrogen in the presence of a catalyst system. The catalyst system contains platinum oxide or contains ruthenium supported on aluminum oxide or activated carbon. The invention also relates to the respective catalysts and processes for producing the catalyst system. | 08-28-2014 |