Olefine polymerization process
AssigneeImperial Chemical Industries PLC
InventorsAnthony D. Caunt, Paul D. Gavens, John McMeeking
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Abstract
A catalyst component is a transition metal composition which is obtained by reacting together an inert particulate material, an organic magnesium compound, a halogen-containing compound such as carbon tetrachloride silicon tetrachloride or boron trichloride and a specified transition metal compound such as VOCl.sub.3, bis(n-butoxy) titanium dichloride or zirconium tetrabenzyl. The catalyst component obtained can be used, together with an organic metal compound, to give an olefin polymerization catalyst. The catalyst can be used to effect the polymerization of olefin monomers, for example, the copolymerization of ethylene with an alpha-olefin monomer such as butene-1 in a fluidized bed reactor.
Claims10
An olefine polymerisation process wherein at least one olefine monomer is contacted, under polymerisation conditions, with an olefine polymerisation catalyst which comprises
- (1) a reaction product obtained by reacting together a component I which is at least one substantially inert solid metal oxide having reactive sites, with a component II which is an organic magnesium compound of the formula
- R.sub.c.sup.2 MgZ.sub.(2-c)
- or a complex or mixture of an organic magnesium compound and an aluminium compound of the formula
- R.sub.c.sup.2 MgZ.sub.(2-c) dR.sub.e.sup.2 AlZ.sub.(3-e)
- or of the formula
- R.sub.c.sup.2 MgZ.sub.(2-c) +dR.sub.e.sup.2 AlZ.sub.(3-e)
- a component III which is at least one halogen-containing component selected from hydrogen halides, boron halides, halogens, inter-halogen compounds and halides of elements of Groups IVB, VA and VIB of the Periodic Table, and a component IV which is a transition metal compound of the formula
- MO.sub.a R.sub.b X.sub.n ;
- and
- (2) an organic compound of a metal of Group IIA of the Periodic Table or of aluminium or a complex of an organic compound of a metal of Group IA or Group IIA of the Periodic Table with an organic compound of aluminium;
- where:
- M is transition metal of Group IVA, VA or VIA of the Periodic Table;
- X is a halogen atom other than fluorine;
- R is a hydrocarbon radical, a substituted hydrocarbon radical or a group OR.sup.1 ;
- R.sup.1 is a hydrocarbon radical or a substituted hydrocarbon radical;
- each R.sup.2, which may be the same or different, is a hydrocarbon radical;
- each Z, which may be the same or different, is a group OR.sup.1 or a halogen atom other than fluorine;
- n is 0 or a number up to the valency of M with the exception that when M is titanium n does not have a value of 4;
- a is 0 or 1;
- b is 0 or a number up to the valency of M;
- 2a+b+n equals the valency of M;
- c has a value of greater than 0 up to 2;
- d has a value of greater than 0 up to 2;
- and
- e has a value of from 0 up to 3.
Dependencies are inferred from the claim text.