Borealis Ag

Borealis Technology Oy

Soile Rautio

Peter Denifl

Pascal Castro

Pertti Elo

Marja Mustonen

Sameer Vijay

Lauri Huhtanen

John Severn

Ove S Andell

Janne Maaranen

Ismo Lehtiniemi

Mikko Lylykangas

Kimmo Hakala

Anu-Leena Hongell

Pasi Matikainen

Tiina Vanne

Tom Elovirta

Jouni Hoikka

Michael Bartke

Marita Oksam

Jeanette Aumo

Jukka Räsänen

The present application aims to provide a process for producing a solid polymerization catalyst component, including the steps of (A) producing a solution with a transition metal compound and a solvent; (B) solidifying a component with the transition metal compound to produce the solid polymerization catalyst component in a solidification stage; (C) recovering from the solidification stage a liquid stream containing a minor amount of the transition metal compound dissolved therein and a solid catalyst stream; and (D) recovering the transition metal component from the liquid stream, characterized in that step (D) may include concentrating the solution to produce a first product stream including the solvent and being essentially free of the transition metal compound and a second product stream including the solvent and the transition metal compound, characterized in that the concentration is conducted within a temperature range of from 0 to 100 degrees Celsius.

Process for recovering a transition metal compound

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.

Process for the preparation of an unsupported, solid metallocene catalyst system and its use in polymerization of olefins

The invention describes ligands of formula (I), wherein LIG represents an &eegr; -ligand substituted by a group R and a group (R&Prime;) ; X represents a 1 to 3 atom bridge; Y represents a nitrogen or phosphorus atom; Z represents a carbon, nitrogen or phosphorus atom.

Catalysts

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Porvoo, Finland

Soile Rautio