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. 15, 2012
Filed:
May. 22, 2008
Luciano Michielin, Mantova, IT;
Olga Pizzutti, Legal Representative, Mantova, IT;
Pier Luigi Di Federico, Ferrara, IT;
Luciano Di Nardo, Ferrara, IT;
Luciano Michielin, Mantova, IT;
Olga Pizzutti, legal representative, Mantova, IT;
Pier Luigi Di Federico, Ferrara, IT;
Luciano Di Nardo, Ferrara, IT;
Basell Polyolefine GmbH, Wesseling, DE;
Abstract
A process for introducing a catalyst powder into a polymerization reactor comprising: a) metering the catalyst powder by means of a rotary valve comprising a stator, a rotor and sealing means arranged between said stator and said rotor; b) transferring a metered amount of catalyst powder from said rotary valve to a polymerization reactor; the process further comprising the steps of: c) feeding a flushing compound in one or more internal conduits arranged in the rotor of said rotary valve; d) flushing the catalyst powder away from said sealing means.