Bp Chemicals Limited

Jean-Pierre Isnard

Claudine Viviane Lalanne-Magne

Renaud Viguier

Marc Jacques Herzog

David Heslop

Laurent Coupier

Myung-Je Shin

Erick Dominique Daire

Frederic Robert Marie Michel Morterol

Patrick Leaney

Patrick Daniel Yves Behue

Sebastien Huchette

Willy Lemesle

Gacem Benazouzz

John Paul McNally

Myung Je Shin

Gacem Benazzouz

Bruno Patrice Soulier

Michel Camoin

The present invention relates to a process for the gas-phase (co-)polymerization of olefins in a fluidised bed reactor using a late transition metal catalyst characterised in that the polymerization is performed in the presence of a process aid additive.

Polymerization process

A process for the continuous gas-phase (co-)polymerisation of olefins in a fluidised bed reactor using a Ziegler-Nata type catalyst wherein the polymerisation is performed in the presence of a process aid additive selected from at least one of (1) a polysulphone copolymer; (2) a polymeric polyamine or (3) an oil-soluble sulphonic acid.

Process for the continuous gas-phase (co-) polymerisation of olefins in a fluidized bed reactor

A process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor using a chromium oxide catalyst. The polymerization is performed in the presence of a process aid additive.

Process for the continuous gas-phase (co-)polymerization of olefins in a fluidized bed reactor

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.

Process for the gas-phase (co)-polymerization of olefins in a fluidized bed reactor

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

A continuous gas fluidized bed process for the polymerization of olefin monomer(s) wherein the recycled gaseous stream withdrawn from the reactor is divided into two streams (A and B) and that (a) a first stream (A) having been cooled to a temperature at which liquid condenses out is then reintroduced directly into the fluidized bed in the reactor in such a way that, at any time, the condensed liquid is continuously introduced into the bed at a minimum rate of 10 liters of liquid per cubic meter of fluidized bed material per hour, and (b) a second stream (B), which by-passes the above cooling/condensing step, is passed through an exchanger and is then reintroduced into the reactor. The continuous introduction of a liquid into the reactor reduces or even eliminates fouling problems which can be encountered in conventional gas phase olefin polymerization processes.

Polymerisation process

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Martigues, France

Jean-Pierre Isnard