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:
Nov. 16, 2004
Filed:
Oct. 07, 2003
Gabriele Govoni, Renazzo, IT;
Massimo Covezzi, Ferrara, IT;
Basell Poliolefine Italia S.p.A., Milan, IT;
Abstract
An apparatus for gas-phase catalytic polymerization comprising a first vertical reactor ( ), a second vertical reactor ( ), the upper region of said reactor ( ) being connected by a connecting part ( ) to a solid as separator ( ), which is in turn connected to the upper region of second reactor ( ), the lower region of second reactor ( ) being connected to the lower region of first reactor ( ) by a connecting part ( ), the solid/gas separator ( ) being connected through a recycle line ( ) to one or more points of reintroduction into connecting part ( ) or into reactor ( ), the apparatus having a line ( ) for feeding catalyst into reactor ( ), a polymer discharge system ( ) from reactor ( ), a line ( ) for feeding monomers, the apparatus being further characterized in that it comprises a line ( ) for feeding gas or liquid into reactor ( ).