Patents by Inventor Elke Senff

Elke Senff 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 the denitration of waste gases with obtention of HNO.sub.3
    Patent number: 5112587
    Abstract: A method for the removal of nitrogen oxides from waste gases and for obtaining nitric acid is described. The waste gas is charged with the required amount of hydrogen peroxide, converted into the gas phase, and the gas mixture is reacted on a solid catalyst to hydrogen nitrate, which is either withdrawn for further use or is converted into nitric acid either by condensation or by scrubbing with water. The method permits the removal of NO.sub.x at low concentrations below 2000 ppm with efficiencies above 90%.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: May 12, 1992
    Assignee: Degussa AG
    Inventors: Wedigo von Wedel, Elke Senff, Oswald Helmling