Borealis Technology Oy

Erik Van Praet

Peter Denifl

Michael Bartke

Thomas Garoff

Marja Mustonen

Kari Pesonen

Marita Oksman

Bill Gustafsson

Remko Van Marion

Mats Baeckman

The invention provides a process for producing an olefin polymerization catalyst, comprising an organometallic compound of a transition metal or of an actinide or lanthanide, in the form of solid catalyst particles, comprising forming a liquid/liquid emulsion system which comprises a solution of one or more catalyst components dispersed in a solvent immiscible therewith; and solidifying said dispersed phase to convert said droplets to solid particles comprising the catalyst and optionally recovering said particles.

Production of olefin polymerization catalysts

The present invention relates to a polyethylene resin comprising A) a first ethylene homo- or copolymer fraction, and B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a lower molecular weight than fraction (B), characterized in that the polymer resin powder obtained directly after the final polymerisation step has a particle size distribution PSDequal to or smaller than 12. Furthermore, the invention relates to a process for the production of a polymer composition comprising: (i) a step in which ethylene monomers, and optionally further alpha-olefin-comonomers, are polymerised in liquid phase in the presence of a polymerisation catalyst, (ii) a step in which ethylene monomers, and optionally further alpha-olefin comonomers, are polymerised in the gas phase in the presence of a polymerisation catalyst, and (iii) obtaining a polymer resin powder after the final polymerisation step wherein the powder has a particle size distribution PSDequal to or smaller than 12.

Polyethylene resin with narrow particle size distribution

The invention provides a process for producing an olefin polymerisation catalyst, comprising suspending a porous particulate support material in a liquid/liquid two phase system, which comprises a solution of one or more catalyst components and an inert solvent immiscible therewith, to impregnate said solution into the pores of said support material, wherein the active transition metal concentration in the support is from 0.001 to 10% by weight of the dry catalyst system.

Production of supported olefin polymerisation catalysts

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Västra Frolunda, Sweden

Erik Van Praet