Patents Assigned to Rheinisch-Westfallisches Elektrizitatswerk Aktiengesellschaft
  • Carboxylic acid activated dry calcium absorbent method for removing sulfur dioxide from a flue gas
    Patent number: 4533532
    Abstract: An absorbent for the dry removal of sulfur dioxide and other noxious and toxic components from a combustion flue gas which consists essentially of at least one finely divided alkaline-earth compound and an additive selected from the group which consists of at least one carboxylic acid or an alkali metal, alkaline-earth metal or ammonium salt thereof.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: August 6, 1985
    Assignee: Rheinisch-Westfallisches Elektrizitatswerk Aktiengesellschaft
    Inventors: Georg R. U. Gebhard, Klaus R. G. Hein, Wolfgang Glaser
  • Absorbent for the dry removal of sulfur dioxide and like components of an exhaust gas
    Patent number: 4526703
    Abstract: An absorbent for the dry removal of sulfur dioxide and other noxious and toxic components from a combustion flue gas which consists essentially of at least one finely divided alkaline-earth compound and an additive selected from the group which consists of at least one carboxylic acid or an alkali metal, alkaline-earth metal or ammonium salt thereof.
    Type: Grant
    Filed: August 26, 1983
    Date of Patent: July 2, 1985
    Assignee: Rheinisch-Westfallisches Elektrizitatswerk Aktiengesellschaft
    Inventors: Georg R. U. Gebhard, Klaus R. G. Hein, Wolfgang Glaser
  • Process for making manganese dioxide
    Patent number: 4006217
    Abstract: Manganese dioxide is prepared from a manganese (III)-containing oxide by disproportionating the latter with a perhalo acid to yield both manganese dioxide and a solution containing manganese (II) ions, and, if desired, removing the manganese dioxide precipitate from the manganese (II) ion solution. The manganese (II) solution wherein the manganese exists as a manganese (II) perhalate can then be quantitatively oxidized to manganese dioxide by ozone.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: February 1, 1977
    Assignee: Rheinisch-Westfallisches Elektrizitatswerk Aktiengesellschaft
    Inventors: Peter Faber, Jean Brenet