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:
Feb. 23, 2010
Filed:
Dec. 27, 2004
Kalle Kallio, Porvoo, FI;
Janne Maaranen, Kerava, FI;
Eija Lappi, Porvoo, FI;
Marina Surakka, Helsinki, FI;
Kalle Kallio, Porvoo, FI;
Janne Maaranen, Kerava, FI;
Eija Lappi, Porvoo, FI;
Marina Surakka, Helsinki, FI;
Borealis Technology Oy, Porvoo, FI;
Abstract
A process for the polymerisation of ethylene and optionally at least one Calpha olefin comonomer in the slurry or solution phase in a reactor having a polymer outlet stream, a procatalyst or catalyst feed stream and a hydrogen feed stream, said polymerisation being effected in the presence of a metallocene catalyst, a diluent and hydrogen, wherein said diluent is recycled from said outlet stream to said hydrogen feed stream, said procatalyst or catalyst feed stream is free of hydrogen, said hydrogen feed stream is free of procatalyst or catalyst and said procatalyst or catalyst feed stream does not comprise recycled diluent.