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:
Aug. 03, 2021
Filed:
Feb. 04, 2019
Basell Polyolefine Gmbh, Wesseling, DE;
Pietro Baita, Ferrara, IT;
Maurizio Dorini, Ferrara, IT;
Giulia Mei, Ferrara, IT;
Gerhardus Meier, Houston, TX (US);
Giuseppe Penzo, Ferrara, IT;
Riccardo Rinaldi, Ferrara, IT;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
A gas-phase polymerization reactor for the gas-phase polymerization of olefins including a polymerization zone having a recycle line for (a) withdrawing reaction gas from the reactor, (b) leading the reaction gas through a heat-exchanger for cooling, and (c) feeding the reaction gas back to the reactor, wherein the recycle line has the heat-exchanger, a centrifugal compressor having variable guide vanes, and a butterfly valve, and a related process for preparing an olefin polymer in the gas-phase polymerization reactor.