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:
Nov. 10, 2020
Filed:
Dec. 21, 2016
Borealis Ag, Vienna, AT;
Mohammad Al-Haj Ali, Helsinki, FI;
Michiel Bergstra, Berchem, BE;
Erik Eriksson, Stenungsund, SE;
Guhan Mathivanan, Linz, AT;
Jukka Räsänen, Porvoo, FI;
Henry Sleijster, Echt, NL;
Sameer Vijay, Linz, AT;
Christof Wurnitsch, Neufelden, AT;
Samuli Zitting, Tuusula, FI;
Vasileios Kanellopoulos, Linz, AT;
Jani Aho, Helsinki, FI;
BOREALIS AG, Vienna, AT;
Abstract
The present invention deals with a process for polymerising olefins in a solution and withdrawing a stream of the solution from the polymerisation reactor and passing it to a sequence of heating steps. The heated solution is passed to a separation step, which is conducted at a pressure of no more than 15 bar and in which separation step a liquid phase comprising the polymer and a vapour phase coexist. A vapour stream and a concentrated solution stream comprising the polymer are withdrawn from the separation step. At least a part of the vapour stream is passed to the first polymerisation reactor, to the second polymerisation reactor or to both.