Patents by Inventor Gerhard Neuenfeldt

Gerhard Neuenfeldt 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).

  • Method for removing chlorate ions from solutions
    Patent number: 6270682
    Abstract: The invention relates to a method for removing chlorate ions from solutions by means of catalytic treatment in the presence of hydrogen. According to the invention a rhodium and/or platinum catalyst is used. The choice of catalyst carrier depends on the amount of coadsorbents contained in the solution. The carrier material, which may be oxidic or non-oxidic, should also be easily wettable.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: August 7, 2001
    Assignee: Solvay Deutschland GmbH
    Inventors: Rutger Van Santen, Armin Klesing, Gerhard Neuenfeldt, Alfred Ottmann
  • Method of removing chlorine and halogen-oxygen compounds from water by catalytic reduction
    Patent number: 5779915
    Abstract: The invention concerns a method of removing substances present in water, in particular halogen-oxygen compounds which remain in the water as residues of disinfecting or are formed as by-products of oxidative water treatment. According to the invention, the substances present in water are removed by catalytic reduction in the presence of hydrogen on a supported precious metal catalyst.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: July 14, 1998
    Assignee: Solvay Umweltchemie GmbH
    Inventors: Arne Becker, Michael Sell, Gerhard Neuenfeldt, Veronika Koch, Hubert Schindler
  • Process for catalytic treatment of waste water as well as a process for regenerating a catalyst
    Patent number: 5695634
    Abstract: A process for regenerating a supported noble metal catalyst and also a process for catalytic treatment of wastewater containing, in particular, organohalogen contaminants, in which the process for regenerating the catalyst is a part of the overall wastewater treatment process.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: December 9, 1997
    Assignee: Solvay Deutschland GmbH
    Inventors: Gerhard Neuenfeldt, Alfred Ottmann, Hubert Schindler
  • Process for catalytic treatment of effluents containing organic and inorganic compounds, preferably from epichlorohydrin production
    Patent number: 5676845
    Abstract: In a catalytic treatment process for effluents containing organic and inorganic compounds, a noble metal catalyst on a support is used. The support preferably is produced according to the sol-gel process.
    Type: Grant
    Filed: September 5, 1995
    Date of Patent: October 14, 1997
    Assignee: Solvay Deutschland GmbH
    Inventors: Helmut Derleth, Karl-Heinz Bretz, Gerhard Neuenfeldt, Hubert Schindler, Alfred Ottmann