Patents by Inventor Sebastian Ahrens
Sebastian Ahrens 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: 10266417Abstract: The present invention relates to a process for the preparation of a zeolitic material comprising the steps of: (1) providing a mixture comprising one or more sources for YO2 and one or more alkenyltrialkylammonium cation R1R2R3R4N+-containing compounds as structure directing agent; and (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material; wherein Y is a tetravalent element, and wherein R1, R2, and R3 independently from one another stand for alkyl; and R4 stands for alkenyl, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.Type: GrantFiled: September 13, 2016Date of Patent: April 23, 2019Assignee: BASF SEInventors: Mathias Feyen, Ulrich Müller, Andrei-Nicolae Parvulescu, Bernd Bastian Schaack, Sebastian Ahrens, Dirk Gerhard, Sunghee Son, Gabriele Iffland, Bianca Seelig
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Patent number: 9821300Abstract: The invention relates to a process for producing a particulate, Si-bonded fluidized-bed catalyst having improved abrasion resistance, which comprises the steps I. provision of an aqueous suspension comprising zeolite particles, II. addition of a silicone resin mixture comprising one or more hydrolyzable silicone resin precondensates and mixing of the aqueous suspension and the silicone resin mixture, III. spray drying of the mixture obtained from step II, with the mixture being homogenized before spray drying, and IV. calcination of the spray-dried fluidized-bed catalyst obtained from step III, and an Si-bonded fluidized-bed catalyst which can be produced by this process and also its use for the nonoxidative dehydroaromatization of C1-C4-aliphatics.Type: GrantFiled: September 21, 2016Date of Patent: November 21, 2017Assignee: BASF SEInventors: Joana Coelho Tsou, Sebastian Ahrens, Christian Schneider, Thomas Heidemann, Bilge Yilmaz, Robert Bayer, Michael Schlei, Sebastian Kranz
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Patent number: 9688606Abstract: Process for scrubbing a crude mixture which is obtained in the nitration of toluene after separating off the nitrating acid and comprises dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid, which comprises two scrubbing steps (WS-I) and (WS-II), wherein i) in a first scrubbing step (WS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (WS-I-1) of the first scrubbing step (WS-I) has a total acid content of from 10 to 40% by weight and a content of from 80 to 350 ppm of hydrocyanic acid, giving a prescrubbed crude mixture, ii) in a second scrubbing step (WS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one, preferably at least 2, extraction stage(s), where the scrubbing acid discharged from the first extraction stage (WS-II-1) of thType: GrantFiled: October 22, 2014Date of Patent: June 27, 2017Assignees: BASF SE, Josef Meissner GmbH & Co. KGInventors: Samuel Neto, Rüdiger Fritz, Renate Hempel, Holger Allardt, Yuan Shen Dai, Barbara Becker, Sebastian Ahrens, Julia Leschinski, Henrich Hermann, Mirko Haendel, Jürgen Pöhlmann
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Publication number: 20170007989Abstract: The invention relates to a process for producing a particulate, Si-bonded fluidized-bed catalyst having improved abrasion resistance, which comprises the steps I. provision of an aqueous suspension comprising zeolite particles, II. addition of a silicone resin mixture comprising one or more hydrolyzable silicone resin precondensates and mixing of the aqueous suspension and the silicone resin mixture, III. spray drying of the mixture obtained from step II, with the mixture being homogenized before spray drying, and IV. calcination of the spray-dried fluidized-bed catalyst obtained from step III, and an Si-bonded fluidized-bed catalyst which can be produced by this process and also its use for the nonoxidative dehydroaromatization of C1-C4-aliphatics.Type: ApplicationFiled: September 21, 2016Publication date: January 12, 2017Applicant: BASF SEInventors: Joana Coelho Tsou, Sebastian Ahrens, Christian Schneider, Thomas Heidemann, Bilge Yilmaz, Robert Bayer, Michael Schlei, Sebastian Kranz
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Publication number: 20170001874Abstract: The present invention relates to a process for the preparation of a zeolitic material comprising the steps of: (1) providing a mixture comprising one or more sources for YO2 and one or more alkenyltrialkylammonium cation R1R2R3R4N+-containing compounds as structure directing agent; and (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material; wherein Y is a tetravalent element, and wherein R1, R2, and R3 independently from one another stand for alkyl; and R4 stands for alkenyl, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.Type: ApplicationFiled: September 13, 2016Publication date: January 5, 2017Applicant: BASF SEInventors: Mathias FEYEN, Ulrich MÜLLER, Andrei-Nicolae PARVULESCU, Bernd Bastian SCHAACK, Sebastian AHRENS, Dirk GERHARD, Sunghee SON, Gabriele IFFLAND, Bianca SEELIG
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Patent number: 9486796Abstract: The invention relates to a process for producing a particulate, Si-bonded fluidized-bed catalyst having improved abrasion resistance, which comprises the steps I. provision of an aqueous suspension comprising zeolite particles, II. addition of a silicone resin mixture comprising one or more hydrolyzable silicone resin precondensates and mixing of the aqueous suspension and the silicone resin mixture, III. spray drying of the mixture obtained from step II, with the mixture being homogenized before spray drying, and IV. calcination of the spray-dried fluidized-bed catalyst obtained from step III, and an Si-bonded fluidized-bed catalyst which can be produced by this process and also its use for the nonoxidative dehydroaromatization of C1-C4-aliphatics.Type: GrantFiled: October 6, 2010Date of Patent: November 8, 2016Assignee: BASF SEInventors: Joana Coelho Tsou, Sebastian Ahrens, Christian Schneider, Thomas Heidemann, Bilge Yilmaz, Robert Bayer, Michael Schlei, Sebastian Kranz
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Patent number: 9475041Abstract: The present invention relates to a process for the preparation of a zeolitic material comprising the steps of: (1) providing a mixture comprising one or more sources for YO2 and one or more alkenyltrialkylammonium cation R1R2R3R4N+-containing compounds as structure directing agent; and (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material; wherein Y is a tetravalent element, and wherein R1, R2, and R3 independently from one another stand for alkyl; and R4 stands for alkenyl, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.Type: GrantFiled: April 24, 2013Date of Patent: October 25, 2016Assignee: BASF SEInventors: Mathias Feyen, Ulrich Mueller, Andrei-Nicolae Parvulescu, Bernd Bastian Schaack, Sebastian Ahrens, Dirk Gerhard, Sunghee Son, Gabriele Iffland, Bianca Seelig
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Publication number: 20160251302Abstract: Process for scrubbing a crude mixture which is obtained in the nitration of toluene after separating off the nitrating acid and comprises dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid, which comprises two scrubbing steps (WS-I) and (WS-II), wherein i) in a first scrubbing step (WS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (WS-I-1) of the first scrubbing step (WS-I) has a total acid content of from 10 to 40% by weight and a content of from 80 to 350 ppm of hydrocyanic acid, giving a prescrubbed crude mixture, ii) in a second scrubbing step (WS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one, preferably at least 2, extraction stage(s), where the scrubbing acid discharged from the first extraction stage (WS-II-1) of tType: ApplicationFiled: October 22, 2014Publication date: September 1, 2016Inventors: SAMUEL NETO, Rüdiger FRITZ, Renate HEMPEL, Holger ALLARDT, Yuan Shen DAI, Barbara BECKER, Sebastian AHRENS, Julia LESCHINSKI, Henrich HERMANN, Mirko HAENDEL, Jürgen PÖHLMANN
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Patent number: 9260397Abstract: The present invention relates to salts comprising novel aryl-alkyl-substituted imidazolium and triazolium cations and arbitrary anions. The invention further relates to methods for the chemical conversion and separation of substances, comprising the salts according to the invention as solvents, solvent additives, or extraction means, and to the use of the salts according to the invention, for example as solvents or solvent additives in chemical reactions, as extracting agents for the separation of substances, or for storing hydrogen.Type: GrantFiled: January 30, 2009Date of Patent: February 16, 2016Assignee: TECHNISCHE UNIVERSITAET DRESDENInventors: Thomas Strassner, Sebastian Ahrens
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Patent number: 9249083Abstract: The invention relates to a process for scrubbing a crude mixture comprising dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid obtained in the nitration of toluene after the nitrating acid has been separated off, which comprises two scrubbing steps (SS-I) and (SS-II), wherein i) in a first scrubbing step (SS-I), the crude mixture is extracted with a scrubbing acid I comprising nitric acid, nitrogen oxides and sulfuric acid in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (SS-I-1) of the first scrubbing step (SS-I) has a total acid content of from 20 to 40% by weight and a prescrubbed crude mixture is obtained, ii) in a second scrubbing step (SS-II), the prescrubbed crude mixture comprising dinitrotoluene is extracted with a scrubbing acid II in a scrub comprising at least one extraction stage, where the scrubbing acid discharged from the first extraction stage (SS-II-1) of the second scrubbing step (SS-II) has a pH of lessType: GrantFiled: April 25, 2013Date of Patent: February 2, 2016Assignees: BASF SE, Josef Meissner GmbH & Co. KGInventors: Samuel Neto, Ruediger Fritz, Renate Hempel, Holger Allardt, Barbara Becker, Julia Leschinski, Sebastian Ahrens, Heinrich Hermann, Mirko Haendel, Juergen Poehlmann
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Patent number: 9096497Abstract: A process for preparing EDDN and/or EDMN by conversion of FA, HCN and EDA, the reaction being effected in the presence of water, and, after the conversion, water being depleted from the reaction mixture in a distillation column, which comprises performing the distillation in the presence of an organic solvent which has a boiling point between water and EDDN and/or EDMN at the distillation pressure existing in the column or which forms a low-boiling azeotrope with water.Type: GrantFiled: August 30, 2012Date of Patent: August 4, 2015Assignee: BASF SEInventors: Hermann Luyken, Sebastian Ahrens, Gordon Brasche, Jens Baldamus, Robert Baumann, Randolf Hugo, Stephanie Jaegli, Johann-Peter Melder, Jörg Pastre, Boris Buschhaus
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Patent number: 9012638Abstract: A process for reacting formaldehyde cyanohydrin (FACH) with ethylenediamine (EDA) in a reactor with limited backmixing at a temperature in the range from 20 to 120° C., wherein the residence time in the reactor is 300 seconds or less.Type: GrantFiled: August 30, 2012Date of Patent: April 21, 2015Assignee: BASF SEInventors: Hermann Luyken, Sebastian Ahrens, Gordon Brasche, Jens Baldamus, Robert Baumann, Randolf Hugo, Stephanie Jaegli, Johann-Peter Melder, Jörg Pastre, Boris Buschhaus
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Patent number: 8952156Abstract: A process is disclosed for separating the output from the reaction of EDDN or EDMN with hydrogen in the presence of THF, a catalyst, TETA or DETA, water, and optionally organic compounds having higher and lower boiling points than TETA or DETA. Hydrogen is removed, and the output is supplied to a distillation column DK1 in which an azeotrope, optionally comprising organic compounds with a boiling point lower than TETA or DETA, is removed from the top. A product comprising TETA or DETA is removed from the bottom and passed into a distillation column DK2, removing THF. A stream comprising TETA or DETA passes from the bottom of DK2. The DK1 azeotrope is condensed. Phase separation is induced by the addition of an organic solvent essentially immiscible with water, and the mixture is separated. The organic phase is recycled into DK1 and the water phase is discharged.Type: GrantFiled: August 30, 2012Date of Patent: February 10, 2015Assignee: BASF SEInventors: Hermann Luyken, Sebastian Ahrens, Gordon Brasche, Jens Baldamus, Robert Baumann, Randolf Hugo, Stephanie Jaegli, Johann-Peter Melder, Jörg Pastre, Boris Buschhaus
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Patent number: 8946459Abstract: A process for reacting ethylenediamine-formaldehyde adduct (EDFA) and/or ethylene-diamine-monoformaldehyde adduct (EDMFA) with hydrogen cyanide (HCN) in a reactor with limited backmixing at a temperature in the range from 20 to 120° C., wherein the residence time in the reactor is 300 seconds or less.Type: GrantFiled: August 30, 2012Date of Patent: February 3, 2015Assignee: BASF SEInventors: Hermann Luyken, Sebastian Ahrens, Gordon Brasche, Jens Baldamus, Robert Baumann, Randolf Hugo, Stephanie Jaegli, Johann-Peter Melder, Jörg Pastre, Boris Buschhaus
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Patent number: 8796496Abstract: The present invention relates to a process for nonoxidatively dehydroaromatizing a reactant stream comprising C1-C4-aliphatics, comprising the steps of I. feeding reactant stream E into a reaction zone 1, converting reactant stream E under nonoxidative conditions in the presence of a particulate catalyst to a product stream P comprising aromatic hydrocarbons and discharging product stream P from reaction zone 1, II. transferring the catalyst with reduced activity as a result of deposited coke into a reaction zone 2, III. at least partly regenerating the catalyst with supply of a hydrogen-comprising gas stream H in a reaction zone 2, at least some of the coke deposited being converted to methane to form a methane-comprising gas stream M which is fed at least partly to reaction zone 1, IV. discharging the catalyst from reaction zone 2 and V.Type: GrantFiled: August 23, 2010Date of Patent: August 5, 2014Assignee: BASF SEInventors: Christian Schneider, Martin Karches, Joana Coelho Tsou, Sebastian Ahrens, Dieter Stuetzer
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Patent number: 8742189Abstract: The present invention relates to a catalyst for dehydroaromatizing C1-C4-aliphatics, said catalyst being obtainable by twice treating a zeolite from the group of MFI and MWW with NH4-containing mixtures, in each case with subsequent drying and calcination. The catalyst comprises molybdenum and, if appropriate, as further elements, Cu, Ni, Fe, Co, Mn, Cr, Nb, Ta, Zr, V, Zn and/or Ga. The present invention further provides a process for dehydroaromatizing a mixture comprising C1-C4-aliphatics by conversion in the presence of the catalyst.Type: GrantFiled: April 8, 2009Date of Patent: June 3, 2014Assignee: BASF SEInventors: Frank Kiesslich, Joana Coelho Tsou, Bilge Yilmaz, Sebastian Ahrens, Thomas Heidemann, Veronika Will, Christian Bechtold
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Patent number: 8729331Abstract: The invention relates to a process for the electrochemical separation of hydrogen from a hydrogen-comprising reaction mixture R by means of a gastight membrane-electrode assembly comprising at least one selectively proton-conducting membrane and at least one electrode catalyst on each side of the membrane, where at least part of the hydrogen present in the reaction mixture R is oxidized to protons over the anode catalyst on the retentate side of the membrane and the protons are, after passing through the membrane to the permeate side, I reduced to hydrogen over the cathode catalyst and/or II reacted with oxygen over the cathode catalyst to form water, with the oxygen originating from an oxygen-comprising stream O which is brought into contact with the permeate side of the membrane, and also a reactor equipped with at least one membrane-electrode assembly.Type: GrantFiled: March 29, 2010Date of Patent: May 20, 2014Assignee: BASF SEInventors: Joana Coelho Tsou, Alexander Panchenko, Annebart Engbert Wentink, Sebastian Ahrens, Thomas Heidemann, Guenther Huber, Albena Kostova
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Patent number: 8609914Abstract: The present invention relates to a process for converting aliphatic hydrocarbons having 1 to 4 carbon atoms to aromatic hydrocarbons in the presence of a catalyst under nonoxidative conditions, wherein at least some of the hydrogen formed in the conversion electrochemically removed is by means of a gas-tight membrane-electrode assembly.Type: GrantFiled: March 30, 2010Date of Patent: December 17, 2013Assignee: BASF SEInventors: Joana Coelho Tsou, Alexander Panchenko, Annebart Engbert Wentink, Sebastian Ahrens, Thomas Heidemann
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Patent number: 8586795Abstract: The invention relates to a process for preparing triethylenetetramine substituted by at least one methyl group (Me-TETA or methyl-substituted TETA compounds). Me-TETA is prepared by hydrogenating biscyanomethylimidazolidine (BCMI) in the presence of a catalyst. The present invention further relates to methyl-substituted TETA compounds as such. The present invention further relates to the use of methyl-substituted TETA compounds as a reactant or intermediate in the production of, for example, coatings or adhesives.Type: GrantFiled: June 14, 2010Date of Patent: November 19, 2013Assignee: BASF SEInventors: Randolf Hugo, Johann-Peter Melder, Robert Baumann, Alfred Oftring, Boris Buschhaus, Gordon Brasche, Sebastian Ahrens, Peter Pfab
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Publication number: 20130296159Abstract: The present invention relates to a process for the preparation of a zeolitic material comprising the steps of: (1) providing a mixture comprising one or more sources for YO2 and one or more alkenyltrialkylammonium cation R1R2R3R4N+-containing compounds as structure directing agent; and (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material; wherein Y is a tetravalent element, and wherein R1, R2, and R3 independently from one another stand for alkyl; and R4 stands for alkenyl, as well as to zeolitic materials which may be obtained according to the inventive process and to their use.Type: ApplicationFiled: April 24, 2013Publication date: November 7, 2013Inventors: Mathias FEYEN, Ulrich Mueller, Andrei-Nicolae Parvulescu, Bernd Bastian Schaack, Sebastian Ahrens, Dirk Gerhard, Sunghee Son, Gabriele Iffland, Bianca Seelig