Patents Assigned to CU Chemie Uetikon AG
  • Composition of matter and its use as a coagulant and flocculent
    Patent number: 6929759
    Abstract: The present invention in a preferred form is a novel composition of matter and a method of use, which includes at least a polyaluminum compound in an aqueous solution for use as a coagulant and/or flocculant. The composition of matter additionally includes magnesium and/or calcium and a water-soluble polymeric flocculant.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: August 16, 2005
    Assignee: CU Chemie Uetikon AG
    Inventors: Herbert Früh, Ulrich Brunner, André Thum
  • Composition of matter and its use as a coagulant and flocculent
    Publication number: 20040195184
    Abstract: The present invention in a preferred form is a novel composition of matter and a method of use, which includes at least a polyaluminum compound in an aqueous solution for use as a coagulant and/or flocculant. The composition of matter additionally includes magnesium and/or calcium and a water-soluble polymeric flocculant.
    Type: Application
    Filed: March 23, 2004
    Publication date: October 7, 2004
    Applicant: CU Chemie Uetikon AG
    Inventors: Herbert Fruh, Ulrich Brunner, Andre Thum
  • Silicon dioxide based microspheres for rapid chromatographic separation of biomolecules
    Patent number: 5762803
    Abstract: Disclosed is a method for the rapid chromatographic separation and analysis of biomolecules using non-porous, monosized silicon dioxide microspheres covered with a dense layer of triorganylsilyl groups.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: June 9, 1998
    Assignee: CU Chemie Uetikon AG
    Inventors: Ervin Kovats, Laszlo Jelinek, Robert Ohmacht
  • Process for the preparation of nitrobenzene
    Patent number: 5334781
    Abstract: The invention concerns a process for the preparation of nitrobenzene from benzene and nitric acid, wherein catalysts are applied based on the zeolite clinoptilolite.
    Type: Grant
    Filed: January 15, 1993
    Date of Patent: August 2, 1994
    Assignee: CU Chemie Uetikon AG
    Inventors: Herman W. Kouwenhoven, Leopoldo Bertea, Roel Prins
  • Process for the preparation of nitrobenzene
    Patent number: 5324872
    Abstract: The invention concerns a gasphase process for the preparation of nitrobenzene from benzene and nitric acid, wherein catalysts are applied based on the zeolite mordenite.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: June 28, 1994
    Assignee: CU Chemie Uetikon AG
    Inventors: Herman W. Kouwenhoven, Leopoldo Bertea, Roel Prins