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:
May. 19, 2009
Filed:
Apr. 15, 2004
Rainer Karer, Kaiserslautern, DE;
Kaspar Evertz, Sulzbach/Taunus, DE;
Peter Kölle, Köln-Rodenkirchen, DE;
Hans-jacob Feindt, Flemington, NJ (US);
Rainer Karer, Kaiserslautern, DE;
Kaspar Evertz, Sulzbach/Taunus, DE;
Peter Kölle, Köln-Rodenkirchen, DE;
Hans-Jacob Feindt, Flemington, NJ (US);
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
Method of metering at least one solid, particulate catalyst into a reactor containing a fluidized bed () of particles in an at least partly gaseous medium, in which the catalyst is metered discontinuously at prescribed time intervals into the fluidized bed () at at least one metering point (). According to the present invention, a fluid stream is firstly introduced into the reactor () so that a region having a reduced particle density is formed in the fluidized bed () around the metering point () and the catalyst is subsequently metered into this region. As a result of the prior introduction of a fluid stream ('preblowing') before the actual introduction of the catalyst, the catalyst can penetrate significantly deeper into the fluidized bed from the metering point due to the reduced particle density and is dispersed better.