Patents by Inventor Werner Motika

Werner Motika 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).

  • Process for the production of isocyanates and for the continuous working-up of the residue
    Patent number: 5446196
    Abstract: Pure isocyanate is recovered from an isocyanate-containing residue of a phosgene/amine reaction mixture by continuously feeding such residue and a high boiling hydrocarbon such as bitumen to a heated vacuum drier with a horizontal shaft. The contents of the drier are subjected to temperatures of from about 160.degree. to about 280.degree. C. and pressures of from about 2 to about 50 mbar. Pure isocyanate and a pourable, non-dusting, granular material are recovered.
    Type: Grant
    Filed: May 23, 1994
    Date of Patent: August 29, 1995
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann-Josef Benedix, Werner Motika
  • Process for separating solid 1,5- and/or 1,8-dinitroanthraquinone and liquid nitrobenzene
    Patent number: 4389344
    Abstract: A process and an equipment for obtaining dry 1,5- and/or 1,8-dinitroanthraquinone from suspensions which contain liquid nitrobenzene whereby in a first stage solid 1,5- and/or 1,8-dinitroanthraquinone with a content of less than 30% by weight of nitrobenzene is separated off mechanically from the suspension at elevated temperature and whereby in a second stage the residued nitrobenzene is removed from the separated 1,5- and/or 1,8-dinitroanthraquinone by lowering the pressure during which the temperature falls.
    Type: Grant
    Filed: November 29, 1979
    Date of Patent: June 21, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Axel Schaefer, Werner Motika, Wolfgang Bender, Jorn Todt, Udo Oels