Bp Chemicals Limited

Ineos Europe Limited

Patrick Leaney

Claudine Viviane Lalanne-Magne

Frederic Robert Marie Michel Morterol

Renaud Viguier

Marc Jacques Herzog

Jean-Pierre Isnard

Sebastien Huchette

Myung-Je Shin

Gacem Benazouzz

Sebastien Hutchette

Claire Couronne

Christel Maire-Claude Mealares

Frederic Morterol

Frederick Morterol

The present invention relates to a 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 SPAN of the polymer powder particles leaving the reactor is maintained below certain values throughout the polymerisation.

Polymerisation control process

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.

Polymerization control process

A process for the gas phase polymerization of one or more alpha-olefins in the presence of a polymerization catalyst system under reactive conditions in a fluidized bed reactor which process comprises introducing into the reactor a deactivating agent characterized in that the deactivating agent is introduced close to the reactor wall and that said introduction does not terminate the polymerization reaction.

Polymerization process

A process for the gas phase polymerization of one or more alpha-olefins conducted in the presence of a catalyst in a reactor having a fluidized bed, in which process, one or more zones having a temperature greater than the average bed temperature are formed at or in close proximity to the reactor wall, comprising the step of deactivating said zones by the introduction into the reactor of an effective quantity of carbon monoxide.

Gas phase polymerization process

The present invention provides a continuous gas fluidised bed process for the polymerisation of olefin monomer selected from (a) ethylene, (b) propylene, (c) mixtures of ethylene and propylene, and (d) one or more other alpha-olefins mixed with (a), (b) or (c), to produce a polymer in a fluidised bed reactor which process comprises:

Polymerisation process

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Bouc Bel Air, France

Patrick Leaney