Patents by Inventor Stefan Röder
Stefan Röder 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).
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Patent number: 11969005Abstract: The invention relates to a method for treating shell-fruits (3), in particular for producing shell-fruits (3) with improved shelling properties in comparison to untreated shell-fruits (3). The invention further relates to a device (1) for treating shell-fruits (3), in particular for producing shell-fruits (3) with improved shelling properties in comparison to untreated shell-fruits (3), comprising a hermetically sealable treatment chamber (2) for conditioning the shell-fruits (3). In order to provide a method and a device for treating shell-fruits which do not damage the contents of the kernel and simultaneously permit improved shelling of the shell-fruits and the opened shell to be better separated from the kernel, the method according to the invention comprises softening the shell of the shell-fruits (3) by applying an electric field, and the device according to the invention comprises at least one capacitor (4) for generating an electric field in the treatment chamber (2).Type: GrantFiled: February 5, 2018Date of Patent: April 30, 2024Assignee: ELEA SERVICE GMBHInventors: Isabell Roeder, Vanessa Volkel, Stefan Topfl
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Patent number: 11186782Abstract: The invention relates to a catalyst for a process for removing mercaptans and optionally disulfides (if present) from hydrocarbon streams, in particular C4 streams, in the presence of higher dienes, in particular C5 dienes. At the same time, the invention also relates to a process for removing mercaptans and disulfides (if present) from hydrocarbon streams, in particular C4 streams, in one embodiment in the presence of 1-butene, by thioetherification of the mercaptans with polyunsaturated hydrocarbons, wherein the process is carried out in a reactor with addition of hydrogen in the presence of higher dienes, in particular C5 dienes.Type: GrantFiled: December 20, 2019Date of Patent: November 30, 2021Assignee: Evonik Operations GmbHInventors: Stephan Peitz, Helene Reeker, Reiner Bukohl, Thomas Quandt, Stefan Röder, Armin Matthias Rix, Andreas Wolff, Guido Stochniol
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Publication number: 20200216763Abstract: The invention relates to a catalyst for a process for removing mercaptans and optionally disulfides (if present) from hydrocarbon streams, in particular C4 streams, in the presence of higher dienes, in particular C5 dienes. At the same time, the invention also relates to a process for removing mercaptans and disulfides (if present) from hydrocarbon streams, in particular C4 streams, in one embodiment in the presence of 1-butene, by thioetherification of the mercaptans with polyunsaturated hydrocarbons, wherein the process is carried out in a reactor with addition of hydrogen in the presence of higher dienes, in particular C5 dienes.Type: ApplicationFiled: December 20, 2019Publication date: July 9, 2020Applicant: Evonik Operations GmbHInventors: Stephan Peitz, Helene Reeker, Reiner Bukohl, Thomas Quandt, Stefan Röder, Armin Matthias Rix, Andreas Wolff, Guido Stochniol
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Patent number: 10519096Abstract: The present invention relates to a process for hydrogenating nitrile compounds to amino compounds, in which the cross-sectional loading of the reactor during the hydrogenation is less than or equal to 4.0 kg/m2*s, based on the liquid phase.Type: GrantFiled: May 17, 2018Date of Patent: December 31, 2019Assignee: Evonik Degussa GmbHInventors: Anne Rittsteiger, Stephan Kohlstruk, Dirk Hoppe, Alexander Martin Rüfer, Sabrina Sowka, Sven Schneider, Norbert Schlüter, Axel Hengstermann, Markus Galle, Stefan Röder, Monika Berweiler
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Publication number: 20180339959Abstract: The present invention relates to a process for hydrogenating nitrile compounds to amino compounds, in which the cross-sectional loading of the reactor during the hydrogenation is less than or equal to 4.0 kg/m2*s, based on the liquid phase.Type: ApplicationFiled: May 17, 2018Publication date: November 29, 2018Inventors: Anne Rittsteiger, Stephan Kohlstruk, Dirk Hoppe, Alexander Martin Rüfer, Sabrina Sowka, Sven Schneider, Norbert Schlüter, Axel Hengstermann, Markus Galle, Stefan Röder, Monika Berweiler
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Patent number: 10125089Abstract: Process for preparing isophoronediamine, characterized in that A) isophoronenitrile is subjected directly in one stage to aminating hydrogenation to give isophoronediamine in the presence of ammonia, hydrogen, a hydrogenation catalyst and possibly further additions, and in the presence or absence of organic solvents; or B) isophoronenitrile is first converted fully or partly in at least two or more than two stages to isophoronenitrile imine, and this isophoronenitrile imine is subjected to aminating hydrogenation to give isophoronediamine as a pure substance or in a mixture with other components and/or isophoronenitrile, in the presence of at least ammonia, hydrogen and a catalyst.Type: GrantFiled: January 26, 2016Date of Patent: November 13, 2018Assignee: Evonik Degussa GmbHInventors: Stephan Kohlstruk, Anne Rittsteiger, Alexander Martin Rüfer, Norbert Schlüter, Sven Schneider, Sabrina Sowka, Guido Streukens, Stefan Röder, Monika Berweiler
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Publication number: 20180230081Abstract: The present invention relates to an improved process for preparing 3-(aminomethyl)-3,5,5-trimethylcyclohexanol, called isophorone amino alcohol (IPAA) hereinafter. In particular, the present invention is directed to a one-stage process for preparing 3-aminomethyl-3,5,5-trimethylcyclohexanol by hydrogenation of isophoronenitrile (IPN) with hydrogen over a catalyst, in the presence or absence of solvents, wherein the catalyst has certain properties.Type: ApplicationFiled: February 12, 2018Publication date: August 16, 2018Inventors: Alexander Martin Rüfer, Anne Rittsteiger, René Poss, Meike Roos, Stefan Röder, Monika Berweiler
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Patent number: 9937483Abstract: Isophoronediamine, is prepared by A) subjecting isophoronenitrile directly in one stage to aminating hydrogenation to give isophoronediamine in the presence of ammonia, hydrogen, a hydrogenation catalyst and an optional additive, and in the presence or absence of an organic solvent; or B) first converting isophoronenitrile fully or partly in at least two or more than two stages to isophoronenitrile imine, and subjecting the isophoronenitrile imine to aminating hydrogenation to give isophoronediamine as a pure substance or in a mixture with another component and/or isophoronenitrile, in the presence of at least ammonia, hydrogen and a catalyst.Type: GrantFiled: March 28, 2016Date of Patent: April 10, 2018Assignee: Evonik Degussa GmbHInventors: Stephan Kohlstruk, Anne Rittsteiger, Alexander Martin Ruefer, Norbert Schlueter, Sven Schneider, Sabrina Sowka, Guido Streukens, Stefan Roeder, Monika Berweiler
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Publication number: 20170362163Abstract: Process for preparing isophoronediamine, characterized in that A) isophoronenitrile is subjected directly in one stage to aminating hydrogenation to give isophoronediamine in the presence of ammonia, hydrogen, a hydrogenation catalyst and possibly further additions, and in the presence or absence of organic solvents; or B) isophoronenitrile is first converted fully or partly in at least two or more than two stages to isophoronenitrile imine, and this isophoronenitrile imine is subjected to aminating hydrogenation to give isophoronediamine as a pure substance or in a mixture with other components and/or isophoronenitrile, in the presence of at least ammonia, hydrogen and a catalyst.Type: ApplicationFiled: January 26, 2016Publication date: December 21, 2017Applicant: Evonik Degussa GmbHInventors: Stephan Kohlstruk, Anne Rittsteiger, Alexander Martin Rüfer, Norbert Schlüter, Sven Schneider, Sabrina Sowka, Guido Streukens, Stefan Röder, Monika Berweiler
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Publication number: 20170226044Abstract: Trimethylhexamethylenediamine is produced by hydrogenating a trimethylhexamethylenedinitrile-comprising mixture in the presence of at least ammonia and hydrogen and a catalyst in the presence or absence of solvent, wherein the catalyst has the following properties: I. after activation the catalyst in its entirety has the following composition in weight percent (wt %), wherein the proportions add up to 100 wt %, based on the metals present: cobalt: 55 to 95 wt %, aluminum: 5 to 45 wt %, chromium: 0 to 3 wt %, and nickel: 0 to 7 wt %, and II. the catalyst is present in the form of irregular particles as granulate and after activation has particle sizes of 1 to 8 mm.Type: ApplicationFiled: January 26, 2017Publication date: August 10, 2017Applicant: Evonik Degussa GmbHInventors: Anne Rittsteiger, Alexander Martin Ruefer, Sven Schneider, Stefan Roeder, Monika Berweiler
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Publication number: 20160289164Abstract: Isophoronediamine, is prepared by A) subjecting isophoronenitrile directly in one stage to aminating hydrogenation to give isophoronediamine in the presence of ammonia, hydrogen, a hydrogenation catalyst and an optional additive, and in the presence or absence of an organic solvent; or B) first converting isophoronenitrile fully or partly in at least two or more than two stages to isophoronenitrile imine, and subjecting the isophoronenitrile imine to aminating hydrogenation to give isophoronediamine as a pure substance or in a mixture with another component and/or isophoronenitrile, in the presence of at least ammonia, hydrogen and a catalyst.Type: ApplicationFiled: March 28, 2016Publication date: October 6, 2016Applicant: Evonik Degussa GmbHInventors: Stephan KOHLSTRUK, Anne RITTSTEIGER, Alexander Martin RUEFER, Norbert SCHLUETER, Sven SCHNEIDER, Sabrina SOWKA, Guido STREUKENS, Stefan ROEDER, Monika BERWEILER
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Publication number: 20130237718Abstract: Process for preparation of a supported catalyst based on hydroxylated inorganic material selected from the group consisting of silica (SiO2), alumina (AL2O3), titania (TiO2), zirconia (ZrO2), lanthanum oxide (La2O3) or mixtures thereof, characterized in that the hydroxylated inorganic material is contacted with organosilicon compounds selected from the group consisting of Formula 1 i.e., [(RO)ySi—[O—(RO)ySi]y—O—Si(RO)y] or Formula 2 i.e., (RO)y—Si—R1—S2-4—R1—Si—(RO)y with R being alkyl and R1 being a linear or branched alkylene having from 1 to 5 carbon atoms and y being an integer from 1 to 3.Type: ApplicationFiled: October 19, 2011Publication date: September 12, 2013Applicant: EVONIK DEGUSSA GMBHInventors: Ralf Hausmann, Manfred Fuchs, Stefan Röder, Cristiano Trionfetti
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Publication number: 20120283088Abstract: The invention relates to mixed oxide catalysts made of hollow shapes for the catalytic gas phase oxidation of olefins, and to a method for producing the catalysts by applying them as a layer to a carrier made of organic material and removing said organic material. The reaction into aldehydes and carboxylic acids occurs by air or oxygen in the presence of inert gases in different quantity ratios, at elevated temperatures and pressure in the presence of said catalysts.Type: ApplicationFiled: June 8, 2012Publication date: November 8, 2012Applicant: Evonik Degussa GmbhInventors: Achim FISCHER, Werner BURKHARDT, Stefan RÖDER, Klaus HUTHMACHER
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Publication number: 20110218362Abstract: A process for the fixed bed hydrogenation of unsaturated fatty nitriles to fatty amines with a fixed bed Raney-type Ni/Al, Co/Al or Ni/Co/Al catalyst in the liquid phase, the trickle phase or any type of fatty nitrile aerosol.Type: ApplicationFiled: November 10, 2004Publication date: September 8, 2011Applicant: DEGUSSA GMBHInventors: Daniel Ostgard, Roberta Olindo, Virginie Duprez, Stefan Röder, Monika Berweiler
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Publication number: 20100324331Abstract: The invention relates to mixed oxide catalysts made of hollow shapes for the catalytic gas phase oxidation of olefins, and to a method for producing the catalysts by applying them as a layer to a carrier made of organic material and removing said organic material. The reaction into aldehydes and carboxylic acids occurs by air or oxygen in the presence of inert gases in different quantity ratios, at elevated temperatures and pressure in the presence of said catalysts.Type: ApplicationFiled: January 28, 2008Publication date: December 23, 2010Inventors: Achim Fischer, Werner Burkhardt, Stefan Röder, Klaus Huthmacher
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Patent number: 6649799Abstract: A method for producing amines by catalytic hydrogenation of nitrites or imines with hydrogen-containing gases in the presence of a molded hydrogenation catalyst of Raney type, where the Raney catalyst is in the form of hollow bodies.Type: GrantFiled: December 21, 2001Date of Patent: November 18, 2003Assignee: Degussa AGInventors: Daniel Ostgard, Monika Berweiler, Stefan Röder
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Patent number: 6566558Abstract: In a process for the hydroformylation of alkanes, alkenes or trialkylboranes under supercritical or near-critical conditions, hydroformylation is effected using a heterogeneous catalyst in a continuous flow reactor containing a supercritical or near-critical reaction medium. Selectivity of product formation may be achieved by independently varying one of more of the temperature, pressure, catalyst, mole ratios of hydrogen and carbon monoxide and flow rate.Type: GrantFiled: March 12, 2001Date of Patent: May 20, 2003Assignee: Thomas Swan & Co., LimitedInventors: Martyn Poliakoff, Nicola J. Meehan, Stephen K. Ross, Stefan Wieland, Stefan Roeder
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Patent number: 6486366Abstract: A method for preparation of alcohols by catalytic hydrogenation of carbonyl compounds with hydrogen or hydrogen-containing gases in the presence of a hydrogenation catalyst of Raney type, where the catalyst is used in the form of hollow bodies, Preferred as catalytically active components are nickel, cobalt, copper, iron, platinum, palladium or ruthenium.Type: GrantFiled: December 21, 2001Date of Patent: November 26, 2002Assignee: Degussa AGInventors: Daniel Ostgard, Monika Berweiler, Stefan Röder
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Publication number: 20020151751Abstract: A process for the preparation of substituted amines by catalytic hydrogenation of substituted organic nitro compounds with hydrogen or hydrogen-containing gas mixtures in the presence of a shaped Raney catalyst as the hydrogenation catalyst, wherein the Raney catalyst is in the form of hollow bodies or shell-activated tablets. Nickel, cobalt, copper, iron, platinum, palladium or ruthenium are preferably used as catalytically active constituents.Type: ApplicationFiled: January 16, 2002Publication date: October 17, 2002Inventors: Daniel Ostgard, Monika Berweiler, Stefan Roeder
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Patent number: 6316646Abstract: A process for the continuous catalytic conversion of organic compounds, that, together with unwanted attendant materials, form a starting substance: first the organic compounds of the starting material are purposely extracted by means of condensed fluids. Then the extract, containing the condensed fluids and organic compounds as the reaction mixture is contacted with a catalyst for the catalytic conversion of the organic compounds to form a product mixture, which contains the individual products of the catalytic conversion. The product mixture is separated from the reaction mixture and the fluids employed are, optionally, conducted back for extraction.Type: GrantFiled: May 7, 1998Date of Patent: November 13, 2001Assignee: Degussa AGInventors: Thomas Tacke, Stefan Röder, Inge Beul, Steffen Laporte, Peter Panster