Patents by Inventor Jan Peter Bredehöft

Jan Peter Bredehöft 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).

  • Reprocessing of reaction material discharged from phosgenation reactors
    Patent number: 7592479
    Abstract: Isocyanates are prepared by reacting primary amines with phosgene in a reactor by a process in which a reaction discharge is present in the form of a suspension which contains the isocyanate to be prepared, as a liquid, and carbamyl chlorides as a solid, and the suspension is worked up in a film evaporator, and this process is carried out in a production plant.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: September 22, 2009
    Assignee: BASF Aktiengesellschaft
    Inventors: Eckhard Stroefer, Stephan Scholl, Martin Sohn, Andreas Woelfert, Hans-Juergen Pallasch, Jan Peter Bredehoeft
  • Reaction column in a special combination with a natural circulation evaporator
    Patent number: 7544832
    Abstract: An arrangement for carrying out chemical reactions comprises at least one distillation column and/or at least one container and at least one circulation evaporator, which are connected to one another via connecting elements, liquid being taken off completely or partly from a tray or from a stacked packing bed or from a dumped packing bed or from a liquid collector of the distillation column or being fed as an external feed stream below the lower tube sheet of the circulation evaporator to said evaporator.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: June 9, 2009
    Assignee: BASF Aktiengesellschaft
    Inventors: Jan Peter Bredehöft, Hans-Jürgen Pallasch, Ludwig E. Heck, Eckhard Ströfer