Patents by Inventor Friedrich W. Diekotter

Friedrich W. Diekotter 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).

  • Hydrothermal disintegration of calcined aluminum oxide wastes
    Patent number: 4557907
    Abstract: A process for hydrothermally disintegrating wastes or residues having a high content of calcined aluminum oxides by reacting said wastes or residues with an aqueous sodium hydroxide solution having a concentration of sodium hydroxide of from about 20 to about 50% by weight at a temperature in the range of from about 180.degree. to about 250.degree. C. under a saturated steam pressure corresponding to said temperature. The sodium aluminate solution obtained is separated off and optionally filtered.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: December 10, 1985
    Assignee: Henkel Kommanditgesellschaft auf Aktien
    Inventors: Peter Christophliemk, Jurgen von Laufenberg, Rudolf Novotny, Siegfried Staller, Friedrich W. Diekotter
  • Process for dewatering zeolite suspensions
    Patent number: 4545969
    Abstract: In the treatment of a zeolite suspension to separate solids from the mother and/or washing liquor, a vibrator is used in the suction drying zone of a vacuum filter in order to partially liquefy the filter cake material through the introduction of shear forces into the solidified filter cake, so that further separation of the pure liquid phase can take place in the suction drying zone of the vacuum filter.
    Type: Grant
    Filed: August 31, 1983
    Date of Patent: October 8, 1985
    Assignee: Henkel KGaA
    Inventors: Friedrich W. Diekotter, Edgar Honges, Gunther Just, Heinz-Gerd Smolka, Willi Wust
  • Calcined .alpha.-alumina filter aids
    Patent number: 4422946
    Abstract: A process for filtering alkaline solutions wherein calcined .alpha.-alumina is used as a filter aid.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: December 27, 1983
    Assignee: Henkel KGaA
    Inventor: Friedrich W. Diekotter