Patents by Inventor Lauwrence Martin Jozef Van Asseldonk

Lauwrence Martin Jozef Van Asseldonk 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).

  • Multi reactor process
    Patent number: 8101693
    Abstract: This invention relates to the polymerization of ethylene polymers using a continuously stirred tank reactor (CSTR) that is connected in series to a tubular reactor. The tubular reactor receives a polymer solution from the CSTR. Further polymerization in the tubular reactor improves production efficiencies, particularly with respect to lowering the amount of energy required to recover the polymer and residual comonomer from the solution. The use of tempered i.e. (heated) ethylene in the tubular reactor has been discovered to mitigate gel problems and lower/reduce levels of hexane extractables.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: January 24, 2012
    Assignee: NOVA Chemicals (International) S.A.
    Inventors: Lauwrence Martin Jozef Van Asseldonk, Stephen John Brown
  • Multi reactor process
    Publication number: 20110144289
    Abstract: This invention relates to the polymerization of ethylene polymers using a continuously stirred tank reactor (CSTR) that is connected in series to a tubular reactor. The tubular reactor receives a polymer solution from the CSTR. Further polymerization in the tubular reactor improves production efficiencies, particularly with respect to lowering the amount of energy required to recover the polymer and residual comonomer from the solution. The use of tempered i.e. (heated) ethylene in the tubular reactor has been discovered to mitigate gel problems and lower/reduce levels of hexane extractables.
    Type: Application
    Filed: December 6, 2010
    Publication date: June 16, 2011
    Inventors: Lauwrence Martin Jozef Van Asseldonk, Stephen John Brown