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:
Jun. 30, 2009
Filed:
Sep. 16, 2004
Shahram Mihan, Bad Soden, DE;
Wolfgang Gsella, Köln, DE;
Peter Kölle, Köln, DE;
Joachim Wulff-döring, Frankenthal, DE;
Shahram Mihan, Bad Soden, DE;
Wolfgang Gsella, Köln, DE;
Peter Kölle, Köln, DE;
Joachim Wulff-Döring, Frankenthal, DE;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
Process for polymerizing at least one olefinic monomer in a loop reactor at from 20 to 150° C., but below the melting point of the polymer to be formed, and a pressure of from 5 to 100 bar, where the polymer formed is present in a suspension in a liquid or supercritical suspension medium and this suspension is circulated by means of an axial pump, wherein the loop reactor comprises a cyclic reactor tube whose diameter varies by at least 10%, based on the predominant reactor tube diameter, and in which there is at least one widening and narrowing in a region other than that of the axial pump.