Patents by Inventor Jacques Heritier

Jacques Heritier 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).

  • Isobutene polymerization process
    Patent number: 6576719
    Abstract: The present application relates to a process for the continuous polymerization of isobutene while maintaining at a constant desired value a property P (viscosity or average molecular mass) of the polymer produced. The polymerization is conducted in a reactor comprising a boiling liquid reaction phase which contains the monomer and the polymer being formed, in equilibrium with a gas phase on top of the said liquid phase, by continuous introduction into the reactor of a catalyst and of a C4 hydrocarbon feed mixture comprising the monomer, and by continuous withdrawal from the reactor of the liquid reaction phase, which is subsequently subjected continuously to at least one purification step which is intended to isolate the polyisobutene produced.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: June 10, 2003
    Assignee: BP Chemicals Limited
    Inventors: Jacques Heritier, Alain Pinede, Christian Sait
  • Isobutene polymerisation process
    Publication number: 20020026024
    Abstract: The present application relates to a process for the continuous polymerization of isobutene while maintaining at a constant desired value a property P (viscosity or average molecular mass) of the polymer produced. The polymerization is conducted in a reactor comprising a boiling liquid reaction phase which contains the monomer and the polymer being formed, in equilibrium with a gas phase on top of the said liquid phase, by continuous introduction into the reactor of a catalyst and of a C4 hydrocarbon feed mixture comprising the monomer, and by continuous withdrawal from the reactor of the liquid reaction phase, which is subsequently subjected continuously to at least one purification step which is intended to isolate the polyisobutene produced.
    Type: Application
    Filed: August 31, 2001
    Publication date: February 28, 2002
    Inventors: Jacques Heritier, Alain Pinede, Christian Sait