Patents by Inventor Erich Hums

Erich Hums 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).

  • Arsenic-resistant mixed oxide catalyst and process for producing the same
    Patent number: 5112794
    Abstract: In an arsenic resistant mixed oxide catalyst and a process for producing the same, oxides of at least the metals vanadium and molybdenum are provided, especially for reducing nitrogen oxides in flue gases in the presence of a reducing agent such as ammonia and carbon monoxide. A MoO.sub.3 phase and at least one oxygen-rich mixed oxide phase such as V.sub.9 Mo.sub.6 O.sub.40 is at least partly converted into a mixed oxide phase being poorer in oxygen such as a V.sub.9 Mo.sub.4 O.sub.25 phase, for increasing arsenic resistance.
    Type: Grant
    Filed: June 21, 1990
    Date of Patent: May 12, 1992
    Assignee: Siemens Aktiengesellschaft
    Inventors: Erich Hums, Gunther Spitznagel
  • Method of making catalysts from titanium oxide
    Patent number: 4954476
    Abstract: The method produces a catalyst containing titanium oxide as a primary ingredient and is prepared from a titanium oxide-containing starting material through a titanium oxide precursor containing a suitable meta or ortho-titanic acid. Meta or ortho-titanic acid is obtained through a hydrothermal process step carried out in the presence of a suitable flocculent or colloid.
    Type: Grant
    Filed: January 25, 1988
    Date of Patent: September 4, 1990
    Assignee: Siemens Aktiengesellschaft
    Inventor: Erich Hums
  • Combustion plant with a device for reducing nitrogen oxides in flue gases
    Patent number: 4880378
    Abstract: A combustion plant having a device for reducing nitrogen oxides in flue gases, includes an injection device for injecting a gaseous reducing agent, and a catalyst arrangement disposed downstream of the injection device in flow direction of the flue gases, and being formed with a catalyst containing elements of the iron group subjectible to a flue gas temperature in excess of 600.degree. C.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: November 14, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Erich Hums
  • Catalyst material for reducing nitrogen oxides in flue gases and method for producing the same
    Patent number: 4851381
    Abstract: A catalyst material for nitrogen oxide reduction in flue gases in the presence of ammonia and a method for producing the same, includes adding vanadium oxide and at least one oxide of the elements from the group consisting of tungsten, phosphorous, sulfur, chromium, zirconium, magnesium, copper, cobalt, iron, and uranium to hydrothermal titanium oxide forming a mixture. The mixture is activated by grinding. A molybdenum component is admixed to the mixture. The mixture is subsequently temperature treated.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: July 25, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Erich Hums
  • Catalyst material for reducing the nitrogen oxides in flue gases
    Patent number: 4849392
    Abstract: A catalyst material for nitrogen oxide reduction in flue gases in the presence of ammonia, comprising hydrothermal titanium dioxide and the additives of vanadium oxide and one or more oxides of the elements tungsten, phosphorus, sulfur, chromium, zirconium, magnesium, copper, cobalt, iron, and uranium, which hydrothermal titanium dioxide and additives material is activated by grinding.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: July 18, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Erich Hums, Dietmar Hein, Helmut Schmelz
  • Plate-like catalyst
    Patent number: 4847234
    Abstract: A plate-like catalyst for reducing nitrogen oxides in flue gases in the presence of a reducing agent includes a support, an undercoating in the form of a ceramic composition disposed on the support, and a catalyst composition containing titanium oxide disposed on the undercoating.
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: July 11, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Erich Hums
  • Catalyst carrier material and method for producing the same
    Patent number: 4814318
    Abstract: A catalyst carrier material formed of titanium dioxide and a method of producing the same, includes a mixture of meta and ortho-titanic acid doped with additives which contribute to the stabilization of the crystalline lattice. The mixture is agglomerated under hydrothermal conditions.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: March 21, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Erich Hums