Patents by Inventor Stefan Dumser

Stefan Dumser 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).

  • Process for a continuous synthesis of zeolitic materials using seed crystals loaded with organotemplate
    Patent number: 11623868
    Abstract: Disclosed herein is a continuous process for preparing zeolitic material with a CHA-type framework structure comprising SiO2 and X2O3 and the zeolitic material so-obtained. The processes comprises (i) preparing a mixture comprising one or more sources of SiO2, one or more sources of X2O3, seed crystals, one or more tetraalkylammonium cation R5R6R7R8N+-containing compounds as structure directing agent, and a liquid solvent system; (ii) continuously feeding the mixture prepared in (i) into a continuous flow reactor at a liquid hourly space velocity; and (iii) crystallizing the zeolitic material with a CHA-type framework structure from the mixture in the continuous flow reactor.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: April 11, 2023
    Assignee: BASF SE
    Inventors: Hannah Schreyer, Andrei-Nicolae Parvulescu, Ulrich Mueller, Christian Riemann, Ralf Boehling, Christoph Schappert, Bernd Hinrichsen, Stefan Dumser, Stefanie Clade
  • Copper-promoted GMElinite and use thereof in the selective catalytic reduction of NOX
    Patent number: 11298656
    Abstract: A catalyst for the selective catalytic reduction of NOx comprises a zeolitic material which comprises (A) one or more zeolites having a GME framework structure containing YO2 and X2O3, and optionally further comprises one or more zeolites having a CHA framework structure containing YO2 and X2O3, and/or comprises, (B) one or more zeolite intergrowth phases of one or more zeolites having a GME framework structure containing YO2 and X2O3 and one or more zeolites having a CHA framework structure containing YO2 and X2O3, wherein Y is a tetravalent element, and X is a trivalent element, and the zeolitic material contains Cu and/or Fe as non-framework elements in an amount ranging from 0.1 to 15 wt. % calculated as the element and based on 100 wt. % of YO contained in the zeolitic material. Also provided are a process for its preparation, and a use in a method for the selective catalytic reduction of NOx.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: April 12, 2022
    Assignee: BASF Corporation
    Inventors: Mathias Feyen, Ulrich Mueller, Faruk Oezkirim, Stefan Dumser, Natalia Trukhan, Michaela Maltry, Stefan Maurer
  • PROCESS FOR A CONTINUOUS SYNTHESIS OF ZEOLITIC MATERIALS USING SEED CRYSTALS LOADED WITH ORGANOTEMPLATE
    Publication number: 20210300772
    Abstract: Disclosed herein is a continuous process for preparing zeolitic material with a CHA-type framework structure comprising SiO2 and X2O3 and the zeolitic material so-obtained. The processes comprises (i) preparing a mixture comprising one or more sources of SiO2, one or more sources of X2O3, seed crystals, one or more tetraalkylammonium cation R5R6R7R8N+-containing compounds as structure directing agent, and a liquid solvent system; (ii) continuously feeding the mixture prepared in (i) into a continuous flow reactor at a liquid hourly space velocity; and (iii) crystallizing the zeolitic material with a CHA-type framework structure from the mixture in the continuous flow reactor.
    Type: Application
    Filed: August 2, 2019
    Publication date: September 30, 2021
    Applicant: BASF SE
    Inventors: Hannah SCHREYER, Andrei-Nicolae PARVULESCU, Ulrich MUELLER, Christian RIEMANN, Ralf BOEHLING, Christoph SCHAPPERT, Bernd HINRICHSEN, Stefan DUMSER, Stefanie CLADE
  • COPPER-PROMOTED GMELINITE AND USE THEREOF IN THE SELECTIVE CATALYTIC REDUCTION OF NOX
    Publication number: 20190134564
    Abstract: A catalyst for the selective catalytic reduction of NOx comprises a zeolitic material which comprises (A) one or more zeolites having a GME framework structure containing YO2 and X2O3, and optionally further comprises one or more zeolites having a CHA framework structure containing YO2 and X2O3, and/or comprises, (B) one or more zeolite intergrowth phases of one or more zeolites having a GME framework structure containing YO2 and X2O3 and one or more zeolites having a CHA framework structure containing YO2 and X2O3, wherein Y is a tetravalent element, and X is a trivalent element, and the zeolitic material contains Cu and/or Fe as non-framework elements in an amount ranging from 0.1 to 15 wt. % calculated as the element and based on 100 wt. % of YO contained in the zeolitic material. Also provided are a process for its preparation, and a use in a method for the selective catalytic reduction of NOx.
    Type: Application
    Filed: June 2, 2017
    Publication date: May 9, 2019
    Applicant: BASF Corporation
    Inventors: Mathias FEYEN, Ulrich MUELLER, Faruk OEZKIRIM, Stefan DUMSER, Natalia TRUKHAN, Michaela MALTRY, Stefan MAURER
  • Process for preparation of zeolitic material
    Patent number: 9878311
    Abstract: The present invention relates to a process for process for the preparation of a zeolitic material which process comprises (i) providing a boron-containing zeolitic material and (ii) deboronating the boron-containing zeolitic material by treating the boron-containing zeolitic material with a liquid solvent system thereby obtaining a deboronated zeolitic material, which liquid solvent system does not contain an inorganic or organic acid, or a salt thereof.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: January 30, 2018
    Assignee: BASF SE
    Inventors: Ulrich Mueller, Andrei-Nicolae Parvulescu, Jeff Yang, Hans-Juergen Luetzel, Georg Uhl, Stefan Dumser
  • PROCESS FOR PREPARATION OF ZEOLITIC MATERIAL
    Publication number: 20160031714
    Abstract: The present invention relates to a process for process for the preparation of a zeolitic material which process comprises (i) providing a boron-containing zeolitic material and (ii) deboronating the boron-containing zeolitic material by treating the boron-containing zeolitic material with a liquid solvent system thereby obtaining a deboronated zeolitic material, which liquid solvent system does not contain an inorganic or organic acid, or a salt thereof.
    Type: Application
    Filed: September 23, 2015
    Publication date: February 4, 2016
    Applicant: BASF SE
    Inventors: Ulrich MUELLER, Andrei-Nicolae Parvulescu, Jeff Yang, Hans-Juergen Luetzel, Georg Uhl, Stefan Dumser
  • Process for preparation of zeolitic material
    Patent number: 9168513
    Abstract: The present invention relates to a process for process for the preparation of a zeolitic material which process comprises (i) providing a boron-containing zeolitic material and (ii) deboronating the boron-containing zeolitic material by treating the boron-containing zeolitic material with a liquid solvent system thereby obtaining a deboronated zeolitic material, which liquid solvent system does not contain an inorganic or organic acid, or a salt thereof.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: October 27, 2015
    Assignee: BASF SE
    Inventors: Ulrich Mueller, Andrei-Nicolae Parvulescu, Jeff Yang, Hans-Juergen Luetzel, Georg Uhl, Stefan Dumser