| abstract |
(57) Abstract: A process for the polymerization of a catalyst in the gas phase, wherein one or more monomers are supplied in the presence of a catalyst under polymerization conditions, and the resulting polymer is discharged in two connected polymerization zones. The growing polymer particles flow into the first polymerization zone under rapid flow conditions, exit the first zone and enter the second polymerization zone, through which they flow in a compressed form under the action of gravity, And is reintroduced into the first polymerization zone, ie the polymer is recycled to the two polymerization zones. The invention is characterized in that introducing a gas of a composition different from that in the first polymerization zone into the second polymerization zone and avoiding introducing a gas in the first polymerization zone into the second polymerization zone is avoided. And This method is particularly suitable for producing blends of olefin polymers having different compositions in a reactor. |