Method for controlling the polymer flow in a polymerization process
AssigneeBasell Poliolefine Italia S.r.l.
InventorsGabriele Mei, Stefano Bertolini
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Abstract
A method for controlling the flowability of polymer particles flowing downward in a densified form inside a polymerization reactor, in which one or more monomers are gas-phase polymerized in the presence of a polymerization catalyst, the density of solid (Kg of polymer per m3 of reactor occupied by the polymer) being higher than 80% of the “poured bulk density” of the polymer, the method being characterized in that a liquid stream is continuously fed into the polymerization reactor at a mass flow rate per unity of reactor surface higher than 30 Kg/h m2.
Claims10
A method for controlling the flowability of polymer particles comprising:
- feeding a liquid stream continuously into a polymerization reactor comprising a polymer bed at a mass flow rate per unity of reactor surface higher than 30 Kg/h-m2,
- wherein the polymer particles comprise a polymer and a density of solid higher than 80% of a poured bulk density of the polymer, where the density of solid is the Kg of polymer per m3 of reactor occupied by the polymer, and the polymer particles flow downward in a densified form inside the polymerization reactor, wherein at least one monomer is gas phase polymerized in the presence of a polymerization catalyst, the monomer comprising fresh monomers.
Dependencies are inferred from the claim text.