Patents by Inventor Burghard Hantel

Burghard Hantel 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).

  • Work-up of distillation residues from the synthesis of toluene diisocyanate
    Patent number: 6673960
    Abstract: A process for working up distillation residues from the synthesis of tolylene diisocyanate by reaction of the distillation residues with water comprises reacting the TDI distillation residues with water in a continuous or semicontinuous process in a backmixed reactor in the presence of hydrolysate.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: January 6, 2004
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Volkmar Schwarz, Markus Maurer, Michael Sander, Eckhard Ströfer, Rene Leuthold, Burghard Hantel, Siegfried Richter, Jörg Therre