US 12,330,147 B2
Apparatus and process for the gas-phase polymerization
Giuseppe Penzo, Mantova (IT); Maurizio Dorini, Ferrara (IT); Riccardo Rinaldi, Ferrara (IT); Silvia Soffritti, Ferrara (IT); and Giulia Mei, Ferrara (IT)
Assigned to Basell Polyolefine GmbH, Wesseling (DE)
Appl. No. 17/782,047
Filed by Basell Polyolefine GmbH, Wesseling (DE)
PCT Filed Dec. 9, 2020, PCT No. PCT/EP2020/085237
§ 371(c)(1), (2) Date Jun. 2, 2022,
PCT Pub. No. WO2021/155977, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 19215247 (EP), filed on Dec. 11, 2019.
Prior Publication US 2023/0001372 A1, Jan. 5, 2023
Int. Cl. B01J 8/00 (2006.01); B01J 8/18 (2006.01); B01J 8/26 (2006.01); B01J 19/24 (2006.01); C08F 2/34 (2006.01); C08F 10/00 (2006.01)
CPC B01J 8/1827 (2013.01) [B01J 8/005 (2013.01); B01J 8/0055 (2013.01); B01J 8/1863 (2013.01); B01J 8/26 (2013.01); B01J 19/2435 (2013.01); C08F 10/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus for carrying out a catalytic gas-phase olefin polymerization comprising
at least a first polymerization zone, adapted and arranged for growing polymer particles to flow upward under fast fluidization or transport conditions, and
at least a second polymerization zone, adapted and arranged for the growing polymer particles to flow downward; and
a gas/solid separation zone having a cylindrical shape;
wherein
the second polymerization zone has an upper part being connected to the separation zone, a lower part being connected to the upper part and a line for feeding a gas, a liquid, or a combination of both into the second polymerization zone;
the first polymerization zone being connected to the separation zone by a connecting part; and
the lower part of the second polymerization zone being connected to the lower part of the first polymerization zone by a connecting part;
wherein the ratio of the diameter D01 of the separation zone to the diameter D03 of the upper part of the second polymerization zone is 1.02 to 1.5;
wherein the ratio of the height H01 of the separation zone to the diameter D01 of the separation zone is 2.5 to 4.5; and
wherein the ratio of the diameter D03 of the upper part of the second polymerization zone to the diameter D04 of the lower part of the second polymerization zone is 1.2 to 2.