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:
Oct. 01, 2024
Filed:
Dec. 16, 2019
Basell Polyolefine Gmbh, Wesseling, DE;
Giuseppe Penzo, Ferrara, IT;
Gerhardus Meier, Houston, TX (US);
Ulf Schueller, Weiterstadt, DE;
Pietro Baita, Ferrara, IT;
Giulia Mei, Ferrara, IT;
Elke Damm, Bad Vilbel, DE;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
A process for preparation of an ethylene polymer in a gas-phase polymerization unit comprising a gas-phase polymerization reactor by homopolymerizing ethylene or copolymerizing ethylene and one or more C-C-1-alkenes in a reaction gas made from or containing propane as polymerization diluent in the presence of a pre-activated polymerization catalyst, wherein a purified propane feed stream made from or containing at least 99 mol % propane and from 0.1 to 100 ppm mol propylene is fed to the gas-phase polymerization unit.