Ineos Commercial Services UK Limited

Ineos Sales (UK) Limited

Jose Andre Laille

Bruno Bordais

Willy Lemesle

Claudine Viviane Lalanne-Magne

Wilhelm Kalz

Christopher James Kemp

Loic Perio

Andreas Harald Gondorf

Christohper James Kemp

Process for introducing a polymerization catalyst in solid form into a gas-phase fluidized bed using an injection device having an inner tube of internal cross-sectional area of 10-100 mmand an outer tube forming an annulus around the inner tube with a cross-sectional area of 1-10 times the internal cross-sectional area of the inner tube. The polymerization catalyst and a carrier gas are passed through the inner tube into the gas-phase fluidized bed at a carrier gas linear velocity of 4-14 m/s and a carrier gas mass flow rate of 10-35 kg/h. A shielding gas is passed through the outer tube and into the gas-phase fluidized bed at a shielding gas linear velocity of 1-10 times the linear velocity of the carrier gas through the inner tube and at a shielding gas mass flow rate of 100-500 kg/h. No cooled recycle process gas is provided to the injection device.

Process for the introduction of a polymerisation catalyst into a gas-phase fluidised bed

Process for polymerization and, in particular, to a process for start-up of a gas phase fluidized bed polymerization reaction involving one or more monomers using a catalyst in a reactor. The process includes providing a start-up bed of particles in the reactor in the presence of the one or more monomers but in the absence of the catalyst, introducing at Tcatalyst to the reactor to initiate reaction and start-up polymer production at a time T, Tbeing between 1 and 6 hours after T. The value of Xis less than a threshold value, wherein: X=Cumulative production in the time period Tto T/(Cumulative catalyst injection the time period Tto T*PC), where PCis the ethylene partial pressure in the reactor at the time T, subsequently stopping the injection of catalyst, and taking a corrective action to address the low value of X.

Process for start-up of a polymerisation reaction fluidised bed

Process for introducing a solid polymerization catalyst into a gas-phase fluidized bed using an injection device having an inner tube of internal cross-sectional area of 10 to 100 mmand an outer tube forming an annulus around the inner tube with a cross-sectional area of 1 to 10 times the internal cross-sectional area of the inner tube. The polymerization catalyst and a carrier gas are passed through the inner tube and into the gas-phase fluidized bed at a carrier gas linear velocity of 4 to 14 m/s and a carrier gas mass flow rate of 10-35 kg/h. A shielding gas is passed through the outer tube and into the gas-phase fluidized bed at a linear velocity of 1 to 10 times the carrier gas linear velocity through the inner tube and at a mass flow rate of 100-500 kg/h. No cooled recycle process gas is provided to the injection device.

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Salon de Provence, France

Jose Andre Laille