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. 16, 2013
Filed:
Nov. 04, 2009
Pertti Elo, Helsinki, FI;
John Severn, Eindhoven, NL;
Peter Denifl, Helsinki, FI;
Soile Rautio, Porvoo, FI;
Marja Mustonen, Koskenkylän saha, FI;
Anu-leena Hongell, Vantaa, FI;
Pertti Elo, Helsinki, FI;
John Severn, Eindhoven, NL;
Peter Denifl, Helsinki, FI;
Soile Rautio, Porvoo, FI;
Marja Mustonen, Koskenkylän saha, FI;
Anu-Leena Hongell, Vantaa, FI;
Borealis AG, Vienna, AT;
Abstract
Improved process for the preparation of an unsupported, heterogeneous olefin polymerization catalyst system, comprising an organometallic compound of a transition metal of Group 3 to 10 of the Periodic Table (IUPAC) or of an actinide or lanthanide in the form of solid particles comprising the steps of a) preparing a solution of catalyst components, including an aluminoxane, a compound being effective to form stable, liquid clathrates with aluminoxane and an organometallic compound of a transition metal of Group 3 to 10 of the Periodic Table (IUPAC 2007) or of an actinide or lanthanide, in a hydrocarbon solvent, yielding a two phase system with an upper solvent layer, which is separated, b) preparing a liquid/liquid emulsion system comprising a continuous phase in which said solution of the catalyst components forms a dispersed phase in the form of droplets, c) solidifying said dispersed phase to convert said droplets to solid particles and optionally recovering said particles to obtain said catalyst system, the catalysts system itself and its use for olefin polymerization.