Patents by Inventor Peter Alexander Knops

Peter Alexander Knops 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).

  • Patent number: 6576738
    Abstract: A process for removal of a catalyst from a polymerization reaction mixture, comprises adding at least one polar solution to the reaction mixture to form a first at least two phase mixture, wherein one phase of the first at least two phase mixture is a first polymer phase; liquid/liquid centrifuging the first at least two phase mixture to separate the phases; removing the first polymer phase from the first at least two phase mixture; adding water to the first polymer phase to form a second at least two phase mixture, where one phase of the second at least two phase mixture is a second polymer phase; and separating the second polymer phase from the second at least two phase mixture.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: June 10, 2003
    Assignee: General Electric Company
    Inventors: Adrianus J. F. M. Braat, Hugo G. E. Ingelbrecht, Peter Alexander Knops, Ruud Trion
  • Publication number: 20020115822
    Abstract: A process for removal of a catalyst from a polymerization reaction mixture, comprises adding at least one polar solution to the reaction mixture to form a first at least two phase mixture, wherein one phase of the first at least two phase mixture is a first polymer phase; liquid/liquid centrifuging the first at least two phase mixture to separate the phases; removing the first polymer phase from the first at least two phase mixture; adding water to the first polymer phase to form a second at least two phase mixture, where one phase of the second at least two phase mixture is a second polymer phase; and separating the second polymer phase from the second at least two phase mixture.
    Type: Application
    Filed: February 25, 2002
    Publication date: August 22, 2002
    Inventors: Adrianus J.F.M. Braat, Hugo G.E. Ingelbrecht, Peter Alexander Knops, Ruud Trion
  • Patent number: 6407202
    Abstract: The present invention relates to substantially pure poly(arylene ether), e.g. purities exceeding about 99%, and to a method for making the same. The method which eliminates multiple rinses with a complexing reagent includes removing the catalyst from the polymerization mixture by mixing the polymerization mixture with a complexing reagent and liquid/liquid centrifuging the multiphase mixture. Water is then added to the polymer phase prior to a subsequent liquid/liquid centrifuge process. Once the catalyst has been sufficiently removed, the polymer can be concentrated in a flash vessel (which is not heated) by introducing a heated polymer phase to the vessel at a high pressure and quickly reducing the pressure. The concentrated polymer can then be introduced to an extruder to produce the high purity polymer. Due to the introduction of low molecular weight poly(arylene ether) at the intake zone of the extruder, essentially pure poly(arylene ether) can be isolated by this process.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: June 18, 2002
    Assignee: General Electric Company
    Inventors: Adrianus J. F. M. Braat, Hugo G. E. Ingelbrecht, Peter Alexander Knops, Ruud Trion