公开(公告)号：US20220023815A1

公开(公告)日：2022-01-27

申请号：US17297438

申请日：2019-11-28

Applicant: BOREALIS AG

Inventor： Mohammad Ali AL-HAJ ,  Kauno ALASTALO

IPC: B01J8/10

Abstract: The present invention is concerned with a process for providing a homogeneous particle-containing slurry comprising the steps of:
(a) providing a vessel comprising at least one impeller rotating around a vertical axis of the vessel, the vessel further comprising an inlet and an outlet; (b) introducing the particle-containing slurry into the vessel or introducing components forming the particle-containing slurry into the vessel; (c) rotating the at least one impeller at least around the vertical axis for homogenizing and/or maintaining a homogeneous particle distribution within the slurry; (d) withdrawing the homogeneous particle-containing slurry via the outlet; (e) stopping the at least one impeller for a maximum time T, whereby T is calculated according to the following relations: u T = 4 ⁢ g ⁡ ( ρ p - ρ f ) ⁢ D p 3 ⁢ ρ f ⁢ C D ( 1 ) C D = 24 Re ⁡ [ 1 + 0.173 ⁢ Re 0.657 ] ( 2 ) T = h u T ( 3 )

公开(公告)号：US20220259342A1

公开(公告)日：2022-08-18

申请号：US17626016

申请日：2020-07-08

Applicant: Borealis AG

Inventor： Mohammad Ali AL-HAJ ,  Noureddine AJELLAL

IPC: C08F210/16

Abstract: A process for the solution polymerization of a polymer from an α-olefin monomer and one or more α-olefin comonomers in the presence of a catalyst, the process having a catalyst performance index (CPI) not higher than 15, wherein the catalyst performance index is defined according to equation (I): CPI = ( F C ⁢ 2 + F C ⁢ 8 ) / F Cat Catalyst ⁢ Productivity ( I ) wherein FC2 and FC8 are the feed velocities of the monomer and comonomer feed streams in kg/h, FCat is the feed velocity of the catalyst and the catalyst productivity is the weight ratio of produced polymer to catalyst.