Patents by Inventor Rolf W. Eckermann

Rolf W. Eckermann 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 continuous production of mono- and polyisocyanates
    Patent number: 4851570
    Abstract: This invention relates to a process for the continuous production of an organic monoisocyanate or polyisocyanate in a single stage reaction. A reaction mixture is formed by continuously mixing, at a temperature elevated above room temperature but not exceeding about 150.degree. C., a solution in a substantially inert organic solvent of a monoamine or polyamine corresponding to the monoisocyanate or polyisocyanate and a solution in a substantially inert organic solvent of phosgene. The reaction mixture is continuously passed upwards from below through a reaction column comprising at least 10 separate chambers separated by perforated plates, wherein each perforation of said perforated plates has a diameter of less than about 20 mm.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: July 25, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gottfried Zaby, Helmut Judat, Siegbert Humburger, Stefaan de Vos, Rolf W. Eckermann