Patents by Inventor Andreas Jan Hoffmann

Andreas Jan Hoffmann 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).

  • Stable small-pore zeolites
    Patent number: 11261097
    Abstract: The present invention provides crystalline aluminosilicate zeolites having a maximum pore size of eight tetrahedral atoms, wherein the zeolite has a total proton content of less than 2 mmol per gram. The zeolite may comprise 0.1 to 10 wt.-% of at least one transition metal, calculated as the respective oxide and based on the total weight of the zeolite. It may furthermore comprise at least one alkali or alkaline earth metal in a concentration of 0 to 2 wt.-%, calculated as the respective metal and based on the total weight of the zeolite. The zeolites may be used for the removal of NOx from automotive combustion exhaust gases.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: March 1, 2022
    Assignee: Umicore AG & Co. KG
    Inventors: Andreas Jan Hoffmann, Michiel De Prins, Sam Smet, Sreeprasanth Pulinthanathu Sree, Elke Jane June Verheyen, Johan Adriaan Martens, Leen Van Tendeloo, Frank-Walter Schuetze
  • Stable CHA Zeolites
    Publication number: 20210138441
    Abstract: The present invention provides hydrothermally stable crystalline aluminosilicate zeolites with a CHA framework type, wherein the zeolite has a total proton content of less than 2 mmol per gram. The zeolite may comprise 0.1 to 10 wt.-% of at least one transition metal, calculated as the respective oxide and based on the total weight of the zeolite. It may furthermore comprise at least one alkali or alkaline earth metal in a concentration of 0 to 2 wt.-%, calculated as the respective metal and based on the total weight of the zeolite. The invention furthermore provides a one-pot synthesis method for making the alumino-silicate zeolites with a CHA framework type. An aqueous reaction mixture comprising a tetraethylammonium compound, a silica source, at least one alkali or alkaline earth metal hydroxide, a zeolite of the faujasite framework type and Cu-tetraethylenepentamine are mixed, homogenized and heated, and finally, the product is recovered.
    Type: Application
    Filed: May 13, 2018
    Publication date: May 13, 2021
    Inventors: Elke Jane June Verheyen, Sreeprasanth Pulinthanathu Sree, Sam Smet, Andreas Jan Hoffmann, Michiel De Prins, Johan Adriaan Martens, Leen Van Tendeloo, Frank-Walter Schuetze
  • Stable Small-Pore Zeolites
    Publication number: 20210070619
    Abstract: The present invention provides crystalline aluminosilicate zeolites having a maximum pore size of eight tetrahedral atoms, wherein the zeolite has a total proton content of less than 2 mmol per gram. The zeolite may comprise 0.1 to 10 wt.-% of at least one transition metal, calculated as the respective oxide and based on the total weight of the zeolite. It may furthermore comprise at least one alkali or alkaline earth metal in a concentration of 0 to 2 wt.-%, calculated as the respective metal and based on the total weight of the zeolite. The zeolites may be used for the removal of NOx from automotive combustion exhaust gases.
    Type: Application
    Filed: May 13, 2019
    Publication date: March 11, 2021
    Inventors: Andreas Jan Hoffmann, Michiel De Prins, Sam Smet, Sreeprasanth Pulinthanathu Sree, Elke Jane June Verheyen, Johan Adriaan Martens, Leen Van Tendeloo, Frank-Walter Schuetze