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. 03, 2012
Filed:
Jan. 25, 2005
Joachim Berthold, Kelkheim, DE;
Frank Peter Alt, Frankfurt, DE;
Kaspar Evertz, Sulzbach, DE;
Peter Kölle, Köln, DE;
Joachim Berthold, Kelkheim, DE;
Frank Peter Alt, Frankfurt, DE;
Kaspar Evertz, Sulzbach, DE;
Peter Kölle, Köln, DE;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
The invention relates to a continuous process for preparing polyolefins having a bimodal or multimodal molar mass distribution in suspension in at least two reactors R, R.x, R.y which are connected in series and in which different reaction conditions are set. In this process, the offgases A, A.x, A.y, Aand Aleaving all the reactors connected in series are firstly collected, the collected offgases are then compressed in a compression stage, the compressed offgases are subsequently cooled and the cooled material is separated into a gaseous fraction and a liquid fraction. The separated fractions are then recirculated to the polymerization process at different points. The process of the invention allows the total conversion of the polymerization, based on monomer and comonomer used, to be increased to a surprising extent.