Patents by Inventor Volker Brehme
Volker Brehme has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9630140Abstract: In a method of absorbing CO2 from a gas mixture the use of an absorption medium comprising water and at least one amine of formula (I) where R1 is a —(CH2)n—(XCH2CH2)m—Y—R3 radical where R3=hydrogen or an alkyl radical having from 1 to 6 carbon atoms, X and Y are each, independently of one another, NR3, oxygen, SO or SO2, where in the case of Y?SO and in the case of Y?SO2, R3 is not hydrogen, and Y—R3 can be an N-morpholinyl radical or an N-piperazyl radical, n=2 to 4, m=0 to 4 and R2 is hydrogen, an alkyl radical having from 1 to 6 carbon atoms or a radical R1, where m is not 0 when R2 is not a radical R1, Y?NR3 and Y—R3 is not an N-morpholinyl radical and not an N-piperazyl radical, makes it possible to avoid precipitation of a solid during the absorption of CO2 and a separation into two liquid phases during the regeneration of the absorption medium.Type: GrantFiled: April 22, 2013Date of Patent: April 25, 2017Assignee: Evonik Degussa GmbHInventors: Benjamin Willy, Stefanie Rinker, Manfred Neumann, Jochen Niemeyer, Michael Keup, Daniel Witthaut, Matthias Seiler, Jörn Rolker, Rolf Schneider, Daniel Dembkowski, Volker Brehme
-
Patent number: 9139547Abstract: The present invention relates to a multi-stage method for preparing alkali metal salts of specific 4-hydroxy-2-oxo-2,5-dihydrofuran-3-carboxylic esters of the formula (I), in which M and R1 are as defined in the description, which proceeds from malonic ester and does not require isolation of intermediates.Type: GrantFiled: July 29, 2013Date of Patent: September 22, 2015Assignee: BAYER CROPSCIENCE AGInventors: Wahed Ahmed Moradi, Christian Funke, Taraneh Farida, Albert Schnatterer, Reiner Rosellen, Volker Brehme, Stefanie Rinker
-
Publication number: 20150210662Abstract: The present invention relates to a multi-stage method for preparing alkali metal salts of specific 4-hydroxy-2-oxo-2,5-dihydrofuran-3-carboxylic esters of the formula (I), in which M and R1 are as defined in the description, which proceeds from malonic ester and does not require isolation of intermediates.Type: ApplicationFiled: July 29, 2013Publication date: July 30, 2015Inventors: Wahed Ahmed Moradi, Christian Funke, Taraneh Farida, Albert Schnatterer, Reiner Rosellen, Volker Brehme, Stefanie Rinker
-
Publication number: 20150125373Abstract: In a method of absorbing CO2 from a gas mixture the use of an absorption medium comprising water and at least one amine of formula (I) where R1 is a —(CH2)n—(XCH2CH2)m—Y—R3 radical where R3=hydrogen or an alkyl radical having from 1 to 6 carbon atoms, X and Y are each, independently of one another, NR3, oxygen, SO or SO2, where in the case of Y?SO and in the case of Y?SO2, R3 is not hydrogen, and Y—R3 can be an N-morpholinyl radical or an N-piperazyl radical, n=2 to 4, m=0 to 4 and R2 is hydrogen, an alkyl radical having from 1 to 6 carbon atoms or a radical R1, where m is not 0 when R2 is not a radical R1, Y?NR3 and Y—R3 is not an N-morpholinyl radical and not an N-piperazyl radical, makes it possible to avoid precipitation of a solid during the absorption of CO2 and a separation into two liquid phases during the regeneration of the absorption medium.Type: ApplicationFiled: April 22, 2013Publication date: May 7, 2015Applicant: Evonik Degussa GmbHInventors: Benjamin Willy, Stefanie Rinker, Manfred Neumann, Jochen Niemeyer, Michael Keup, Daniel Wittaut, Matthias Seiler, Jörn Rolker, Rolf Schneider, Daniel Dembkowski, Volker Brehme
-
Publication number: 20140243562Abstract: 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.Type: ApplicationFiled: November 25, 2013Publication date: August 28, 2014Applicant: Evonik Industries AGInventors: Marianne OMEIS, Manfred NEUMANN, Volker BREHME, Christoph THEIS, Dorit WOLF, Peter CLAUS, Martin LUCAS, Rene ECKERT
-
Patent number: 8784537Abstract: CO2 is absorbed from a gas mixture by contacting the gas mixture with an absorption medium which comprises at least water as solvent and at least one amine of formula (I) where R1 is an aliphatic radical, having 2 to 6 carbon atoms and at least one amino group, and R2 is hydrogen, a C1-4 alkyl radical or a radical R1.Type: GrantFiled: November 10, 2011Date of Patent: July 22, 2014Assignee: Evonik Degussa GmbHInventors: Matthias Seiler, Rolf Schneider, Jörn Rolker, Daniel Dembkowski, Manfred Neumann, Daniel Witthaut, Michael Keup, Volker Brehme, Muhammad Irfan
-
Patent number: 8722953Abstract: 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.Type: GrantFiled: June 6, 2007Date of Patent: May 13, 2014Assignee: Evonik Degussa GmbHInventors: Volker Brehme, Manfred Neumann, Frank Bauer, Elke Fiebig-Bauer, Franz Rudolf Bauer, Johanna Elisabeth Bauer, Dirk Roettger
-
Publication number: 20130247758Abstract: CO2 is absorbed from a gas mixture by contacting the gas mixture with an absorption medium which comprises at least water as solvent and at least one amine of formula (I) where R1 is an aliphatic radical, having 2 to 6 carbon atoms and at least one amino group, and R2 is hydrogen, a C1-4 alkyl radical or a radical R1.Type: ApplicationFiled: November 10, 2011Publication date: September 26, 2013Applicant: Evonik Degussa GmbHInventors: Matthias Seiler, Rolf Schreider, Jörn Rolker, Daniel Dembkowski, Manfred Neumann, Daniel Witthaut, Michael Keup, Volker Brehme, Muhammad Irfan
-
Patent number: 8252934Abstract: 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.Type: GrantFiled: January 29, 2009Date of Patent: August 28, 2012Assignee: Evonik Degussa GmbHInventors: Volker Brehme, Daniel Dembkowski
-
Patent number: 7847133Abstract: 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 0.05 is established in the reaction column.Type: GrantFiled: May 27, 2008Date of Patent: December 7, 2010Assignee: Evonik Degussa GmbHInventors: Johannes Ruwwe, Kai-Martin Krüger, Udo Knippenberg, Volker Brehme, Manfred Neumann
-
Publication number: 20090287032Abstract: 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.Type: ApplicationFiled: June 6, 2007Publication date: November 19, 2009Applicant: EVONIK DEGUSSA GMBHInventors: Volker Brehme, Manfred Neumann, Frank Bauer, Elke Fiebig-Bauer, Franz Rudolf Bauer, Johanna Elisabeth Bauer, Dirk Roettger
-
Publication number: 20090209766Abstract: 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.Type: ApplicationFiled: January 29, 2009Publication date: August 20, 2009Applicant: EVONIK DEGUSSA GmbHInventors: Volker Brehme, Daniel Dembkowski
-
Publication number: 20080296786Abstract: 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.Type: ApplicationFiled: May 27, 2008Publication date: December 4, 2008Applicant: Evonik Degussa GmbHInventors: Johannes Ruwwe, Kai-Martin Kruger, Udo Knippenberg, Volker Brehme, Manfred Neumann
-
Patent number: 7385092Abstract: A process for preparing diols or triols made up of a1) reacting at least one monoolefin having 4 to 20 carbon atoms with hydrogen peroxide and formic acid in the presence of water to form a mixture or a2) reacting at least one monoolefin alcohol having 4 to 20 carbon atoms first with formic acid, and then reacting the product formed thereby with hydrogen peroxide in the presence of water to form a mixture, b) removing, by distillation, the water and formic acid from the mixture obtained in a1) or a2), c) reacting the mixture obtained from b) with an aliphatic alcohol in the presence of a sulfonic acid to form the diol or triol and at least one formic ester by-product, and d) optionally removing, by distillation, the at least one formic ester by-product formed together with any residual at least one aliphatic C1-C4-alcohol to isolate the diol or triol.Type: GrantFiled: December 15, 2005Date of Patent: June 10, 2008Assignee: Degussa AGInventors: Clemens Osterholt, Volker Brehme, Thomas Kübelbäck, Günther Köhler
-
Patent number: 7208640Abstract: A process for isolating purified 2-methoxypropene from a mixture which comprises 2,2-dimethoxypropane, 2-methoxypropene, methanol, acetone, and optionally other carbonyl group-containing compounds, which process involves subjecting the mixture to distillation, adding 2-aminoethanol and at least one base as assistants in the distillation, and isolating purified 2-methoxypropene.Type: GrantFiled: April 28, 2005Date of Patent: April 24, 2007Assignee: Degussa AGInventors: Günther Köhler, Volker Brehme, Manfred Neumann, Clemens Osterholt
-
Publication number: 20060161025Abstract: A process for preparing diols or triols made up of a1) reacting at least one monoolefin having 4 to 20 carbon atoms with hydrogen peroxide and formic acid in the presence of water to form a mixture or a2) reacting at least one monoolefin alcohol having 4 to 20 carbon atoms first with formic acid, and then reacting the product formed thereby with hydrogen peroxide in the presence of water to form a mixture, b) removing, by distillation, the water and formic acid from the mixture obtained in a1) or a2), c) reacting the mixture obtained from b) with an aliphatic alcohol in the presence of a sulfonic acid to form the diol or triol and at least one formic ester by-product, and d) optionally removing, by distillation, the at least one formic ester by-product formed together with any residual at least one aliphatic C1-C4-alcohol to isolate the diol or triol.Type: ApplicationFiled: December 15, 2005Publication date: July 20, 2006Applicant: Degussa AGInventors: Clemens Osterholt, Volker Brehme, Thomas Kuebelback, Gunther Kohler
-
Publication number: 20050245769Abstract: A process for isolating purified 2-methoxypropene from a mixture which comprises 2,2-dimethoxypropane, 2-methoxypropene, methanol, acetone, and optionally other carbonyl group-containing compounds, which process involves subjecting the mixture to distillation, adding 2-aminoethanol and at least one base as assistants in the distillation, and isolating purified 2-methoxypropene.Type: ApplicationFiled: April 28, 2005Publication date: November 3, 2005Applicant: DEGUSSA AGInventors: Gunther Kohler, Volker Brehme, Manfred Neumann, Clemens Osterholt
-
Patent number: 6790987Abstract: The present invention relates to a process of cleaving lactones optionally having functional groups to give carboxylic acids, where the corresponding lactone is reacted with hydrogen with catalysis by a compound of a metal of group VIII of the Periodic Table of the Elements which has been modified with organophosphines. The process is preferably carried out in a two-phase system using catalysts which have water-soluble phosphine ligands. The reaction is particularly suitable for cleavage 2-ethylidene-6-hepten-5-olide to give ethylidene-6-heptenecarboxylic acid or isomers thereof. This carboxylic acid can be hydrogenated in a manner known per se to give 2-ethylheptanoic acid.Type: GrantFiled: February 20, 2003Date of Patent: September 14, 2004Assignee: BASF AktiengesellschaftInventors: Arno Behr, Volker Brehme
-
Publication number: 20030176737Abstract: The present invention relates to a process of cleaving lactones optionally having functional groups to give carboxylic acids, where the corresponding lactone is reacted with hydrogen with catalysis by a compound of a metal of group VIII of the Periodic Table of the Elements which has been modified with organophosphines. The process is preferably carried out in a two-phase system using catalysts which have water-soluble phosphine ligands.Type: ApplicationFiled: February 20, 2003Publication date: September 18, 2003Inventors: Arno Behr, Volker Brehme