Patents by Inventor Hermann-Josef Benedix

Hermann-Josef Benedix 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