Process for the polymerisation or copolymerisation of...

Details Process for the polymerisation or copolymerisation of... Process for the polymerisation or copolymerisation of...

C - Chemistry, Metallurgy

08

F

402/613

C08F 4/60 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1255446

BP CASE NO. 5896(B147) ABSTRACT OF THE DISLCOSURE PROCESS FOR THE POLYMERISATION OR COPOLYMERISATION OF ALPHA-OLEFINS IN A FLUIDISED BED, IN THE PRESENCE OF A ZIEGLER-NATTA CATALYSTS SYSTEM. The present invention relates to a process for the polymerisation or copolymerisation in a fluidised bed of alpha-olefins comprising 2 to 8 carbon atoms, by means of a Ziegler-Natta type catalyst system, consisting of a catalyst (a) comprising atoms of magnesium, halogen and a transition metal and a cocatalyst (b) consisting of an organo-metallic, which process is characterised in that the catalyst system is first of all either fixed on an inorganic granular support, or converted into a prepolymer, then subjected to a treatment by means of a polymerisation inhibiting agent, before being brought into contact with the alpha-olefins under polymerisation or copolymerisation conditions in a fluidised bed, in the presence of an additional quantity of co-catalyst (c) consisting of an organo-metallic compound which is identical to or different from that of which co-catalyst (b) consists.

484946

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