The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2021
Filed:
Apr. 28, 2017
Borealis Ag, Vienna, AT;
Pauli Leskinen, Helsinki, FI;
Erno Elovainio, Helsinki, FI;
Katri Nikkilä, Espoo, FI;
Jukka-Pekka Parjanen, Porvoo, FI;
Jani Aho, Helsinki, FI;
BOREALIS AG, Vienna, AT;
Abstract
The present invention is directed to a process for feeding a polymerisation catalyst into a polymerisation reactor (), comprising the steps of: (i) maintaining a catalyst slurry comprising a diluent and a solid catalyst component in a catalyst feed vessel (); (ii) continuously withdrawing a stream of the catalyst slurry from the catalyst feed vessel (); and (iii) introducing the withdrawn portion of the catalyst slurry into the polymerisation reactor (), wherein the catalyst slurry is transferred by using a valveless piston pump () from the catalyst feed vessel () into the polymerisation reactor (); the diluent has a dynamic viscosity of from 0.01 to 20 mPas at the conditions within the catalyst feed vessel (), and wherein the catalyst slurry is transferred along a substantially vertical path downwards from the catalyst feed vessel () to the reactor ().