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:
Apr. 14, 2009
Filed:
Sep. 16, 2004
Shahram Mihan, Bad Soden, DE;
Wolfgang Gsella, Köln, DE;
Peter Kölle, Köln-Rodenkirchen, DE;
Joachim Wulff-döring, Frankenthal, DE;
Markus Meierhöfer, Hürth, DE;
Shahram Mihan, Bad Soden, DE;
Wolfgang Gsella, Köln, DE;
Peter Kölle, Köln-Rodenkirchen, DE;
Joachim Wulff-Döring, Frankenthal, DE;
Markus Meierhöfer, Hürth, DE;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
Process for polymerizing at least one olefinic monomer selected from ethylene, propylene and 1-butene in a loop reactor in the presence of a polymerization catalyst at from 20 to 150° C., but below the melting point of a polymer to be formed, and a pressure of from 43 to 80 bar, where the polymer formed is present in a suspension in a liquid or supercritical suspension medium and wherein the suspension is circulated by means of an axial pump, wherein the polymerization is carried out at an average solids concentration in the reactor of more than 53% by weight, in the case of continuous product discharge, and at an average solids concentration in the reactor of more than 45% by weight, in the case of discontinuous product discharge, and wherein the polymerization is carried out at an ethylene concentration of at least 10 mol %, based on the suspension medium.