Patents by Inventor Gacem Benazouzz

Gacem Benazouzz 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).

  • Polymerization control process
    Patent number: 6884856
    Abstract: The present invention relates to a continuous process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density of the polymer powder particles leaving the reactor is maintained constant by controlling the particle size distribution of the polymerisation catalyst. The present invention also relates to a process for controlling the particle size distribution of a polymerisation catalyst in order to achieve the production of a polymer powder of constant density during the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: April 26, 2005
    Assignee: BP Chemicals Limited
    Inventors: Gacem Benazouzz, Claire Couronne, Sebastien Huchette, Patrick Leaney, Christel Maire-Claude Mealares, Frederic Robert Marie Michel Morterol, Renaud Viguier
  • Polymerisation control process
    Publication number: 20040186249
    Abstract: The present invention relates to a continuous process for controlling the gas-phase co-polymerisation of olefins in a fluidised bed reactor. The present invention further relates to a method for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor in the presence of a polymerisation catalyst wherein the density of the polymer powder particles leaving the reactor is maintained constant by controlling the particle size distribution of the polymerisation catalyst. The present invention also relates to a process for controlling the particle size distribution of a polymerisation catalyst in order to achieve the production of a polymer powder of constant density during the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor.
    Type: Application
    Filed: January 15, 2004
    Publication date: September 23, 2004
    Inventors: Gacem Benazouzz, Claire Couronne, Sebastien Huchette, Patrick Leaney, Christel Maria-Claude Mealares, Frederic Robert Marie Michel Morterol, Renaud Viguier
  • Process for the gas-phase (co)-polymerization of olefins in a fluidized bed reactor
    Patent number: 6562924
    Abstract: A process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor using a metallocene catalyst in that the polymerization is preformed in the presence of a process aid additive selected from at least one of 1) a polysulfone copolymer, 2) a polymeric polyamine, or 3) an oil-soluble sulfonic acid.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: May 13, 2003
    Assignee: BP Chemicals Limited
    Inventors: Gacem Benazouzz, Michel Camoin, Laurent Coupier, Jean-Pierre Isnard, Frederic Robert Marie Michel Morterol, John Paul McNally, Renaud Viguier
  • Process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor
    Publication number: 20020091208
    Abstract: A process for the gas-phase (co-)polymerisation of olefins in a fluidised bed reactor using a metallocene catalyst. The polymerisation is performed in the presence of a process aid additive.
    Type: Application
    Filed: November 6, 2001
    Publication date: July 11, 2002
    Inventors: Gacem Benazouzz, Michel Camoin, Laurent Coupier, Jean-Pierre Isnard, Frederic Robert Marie Michel Morterol, John Paul McNally, Renaud Viguier