Patents by Inventor Helmut Hartsberger

Helmut Hartsberger 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).

  • Catalyst and method for producing phthalic anhydride
    Patent number: 8097558
    Abstract: The present invention relates to a catalyst, in particular for the preparation of phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, having an inert support and at least one layer which has been applied thereto and has a catalytically active composition comprising TiO2, characterized in that at least a portion of the TiO2 used has the following properties: (a) the BET surface area is more than 15 m2/g, (b) at least 25% of the total pore volume is formed by pores having a radius between 60 and 400 nm, and (c) the primary crystal size is more than 22 ångstrøm. Also described is a preferred process for preparing such a catalyst, and the preferred use of the titanium dioxide used in accordance with the invention.
    Type: Grant
    Filed: May 22, 2005
    Date of Patent: January 17, 2012
    Assignee: Sud-Chemie AG
    Inventors: Marvin Estenfelder, Helmut Hartsberger, Christian Gūckel
  • Catalyst and method for preparing phthalic anhydride
    Patent number: 7618918
    Abstract: The present invention relates to a catalyst, in particular for the preparation of phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, having an inert support and at least one layer which has been applied thereto and has a catalytically active composition comprising TiO2, characterized in that at least a portion of the TiO2 used has the following properties: (a) the BET surface area is more than 15 m2/g, (b) the primary crystal size is more than 210 ångstrøm. Also described is a preferred process for preparing such a catalyst, and the preferred use of the titanium dioxide used in accordance with the invention.
    Type: Grant
    Filed: November 28, 2005
    Date of Patent: November 17, 2009
    Assignee: Süd-Chemie AG
    Inventors: Marvin Estenfelder, Helmut Hartsberger, Christian Guckel
  • Catalyst and Method For Producing Phthalic Anhydride
    Publication number: 20080207924
    Abstract: The present invention relates to a catalyst, in particular for the preparation of phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, having an inert support and at least one layer which has been applied thereto and has a catalytically active composition comprising TiO2, characterized in that at least a portion of the TiO2 used has the following properties: (a) the BET surface area is more than 15 m2/g, (b) at least 25% of the total pore volume is formed by pores having a radius between 60 and 400 nm, and (c) the primary crystal size is more than 22 ångstrøm. Also described is a preferred process for preparing such a catalyst, and the preferred use of the titanium dioxide used in accordance with the invention.
    Type: Application
    Filed: May 22, 2005
    Publication date: August 28, 2008
    Inventors: Marvin Meissner Estenfelder, Helmut Hartsberger, Christian Guckel
  • Catalyst and Method for Preparing Phthalic Anhydride
    Publication number: 20080015364
    Abstract: The present invention relates to a catalyst, in particular for the preparation of phthalic anhydride by gas phase oxidation of o-xylene and/or naphthalene, having an inert support and at least one layer which has been applied thereto and has a catalytically active composition comprising TiO2, characterized in that at least a portion of the TiO2 used has the following properties: (a) the BET surface area is more than 15 m2/g, (b) the primary crystal size is more than 210 ångstrøm. Also described is a preferred process for preparing such a catalyst, and the preferred use of the titanium dioxide used in accordance with the invention.
    Type: Application
    Filed: November 28, 2005
    Publication date: January 17, 2008
    Inventors: Marvin Estenfelder, Helmut Hartsberger, Christian Guckel