公开(公告)号：US10035866B2

公开(公告)日：2018-07-31

申请号：US15033395

申请日：2014-10-30

Applicant: BOREALIS AG

Inventor： Peter Denifl ,  Timo Leinonen ,  Pasi Matikainen ,  Tom Elovirta

IPC: C08F10/00 ,  B01J31/14 ,  B01J31/16 ,  B01J31/22 ,  G05B13/00 ,  B01J35/02

CPC classification number: C08F10/00 ,  B01J31/143 ,  B01J31/1608 ,  B01J31/2295 ,  B01J35/023 ,  G05B13/00 ,  C08F4/6546

Abstract: The present invention is directed to a process for producing a solid olefin polymerization catalyst component from an emulsion wherein the particle size of the solid catalyst or the droplet size of the emulsion is controlled. The actual size of the droplets or the solid catalyst particles is measured, or alternatively, both are measured. Then a difference between the actual size and the set point is calculated and the process is controlled based on the difference.

公开(公告)号：US12146019B2

公开(公告)日：2024-11-19

申请号：US17413765

申请日：2019-11-28

Applicant: BOREALIS AG

Inventor： Pasi Matikainen ,  Emilia Helisevä ,  Jukka-Pekka Parjanen

IPC: B01D21/26 ,  B01J8/00 ,  C08F4/643 ,  C08F10/00

Abstract: A process for washing a particulate substance comprising: (i) combining a particulate substance and a first washing medium in a first vessel to form a slurry and washing the particulate substance with said washing medium; (ii) transferring the slurry to a hydrocyclone; (iii) removing a first by-product stream depleted in particulate substance and a first product stream enriched in particulate substance from the hydrocyclone; (iv) transferring the first product stream to a second vessel and in the presence of a second washing medium forming a slurry and washing the particulate substance with said second washing medium e.g. by agitation thereof; (v) transferring the slurry to a hydrocyclone; (vi) removing a second by-product stream depleted in particulate substance and a second product stream enriched in particulate substance from the hydrocyclone.

公开(公告)号：US20240343839A1

公开(公告)日：2024-10-17

申请号：US18294203

申请日：2022-08-30

Applicant: Borealis AG

Inventor： Mikka Kuusisto ,  Samuli Zitting ,  Erno Elovainio ,  Mikko Lylykangas ,  Pasi Matikainen

IPC: C08F2/34 ,  C08F2/01 ,  C08F6/00

CPC classification number: C08F2/34 ,  C08F2/01 ,  C08F6/001

Abstract: A gas phase polymerization assembly comprising a gas phase polymerization reactor having at least one inlet and at least one outlet, a circulation gas compression unit having an inlet and an outlet, whereby the inlet of the circulation gas compression unit is fluidly connected to the at least one outlet of the gas phase polymerization reactor by an unreacted gas line; a flush gas compression unit having an inlet and an outlet, wherein the inlet of the flush gas compression unit is fluidly connected to the outlet of the circulation gas compression unit by a pressurized unreacted gas line; a circulation line fluidly connecting the pressurized unreacted gas line with the at least one inlet of the gas phase polymerization reactor; a flush gas withdrawal line connected to the outlet of the flush gas compression unit.