Magnesium dichloride-ethanol adducts and catalyst components obtained therefrom
AssigneeBasell Poliolefine Italia S.r.l.
InventorsGianni Collina, Daniele Evangelisti, Mario Sacchetti
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Abstract
Adducts are provided comprising MgCl2, ethanol and a Lewis base (LB), said compounds being present in molar ratios defined by the following formula MgCl2.(EtOH)n(LB)p in which n is from 2 to 6 and p has values satisfying the following equation p/(n+p)≦0.1. The said adducts can be used as precursor in the preparation of high activity ZN catalysts.
Claims6
A catalyst component for polymerizing at least one olefin comprising a product of a reaction between a transition metal compound and an adduct, wherein the transition metal compound is selected from a titanium compound of formula Ti(OR)nXy-n, wherein n is between 0 and y;
- y is a valence of titanium;
- X is halogen;
- and R is an alkyl radical comprising 1-8 carbon atoms, or COR, wherein R is a hydrocarbon group comprising from 1 to 20 carbon atoms, and the adduct comprises MgCl2, ethanol and a Lewis base (LB) different from water, said adduct further comprising a fusion enthalpy lower than 100 J/g, and formula MgCl2•(EtOH)n(LB)p, wherein n is from 2 to 6 and p is 0<p/(n+p)≦0.1, where the Lewis base is selected from ethers, esters, compounds of formula RXm, and combinations thereof, wherein RXm is selected from the group consisting of methanol, propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, pentanol, 2-methyl-1-pentanol, 2-ethyl-1-hexanol, phenol, 4-methyl-1-phenol, 2,6-dimethyl-1-phenol, cyclohexanol, cyclopentanol, ethylene glycol, propylene glycol, 1,4-butanediol, glycerine, mannitol, polyvinyl-alcohol, acetonitrile, ethylenediamine, 3-picoline, triethanolamine, triethylamine, and diisopropylamine.
A catalyst component for polymerizing at least one olefin, the catalyst component comprising a product of a reaction between a transition metal compound and an adduct,
- the adduct comprising MgCl2, ethanol and a Lewis base (LB) different from water, said adduct further comprising a fusion enthalpy lower than 100 J/g, and formula MgCl2.(EtOH)n(LB)p, wherein n is from 2 to 6 and p is 0<p/(n+p)≦0.1, where the Lewis base is selected from ethers, esters, compounds of formula RXm, and combinations thereof, wherein RXm is selected from the group consisting of methanol, propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, pentanol, 2-methyl-1-pentanol, 2-ethyl-1-hexanol, phenol, 4-methyl-1-phenol, 2,6-dimethyl-1-phenol, cyclohexanol, cyclopentanol, ethylene glycol, propylene glycol, 1,4-butanediol, glycerine, mannitol, polyvinyl-alcohol, acetonitrile, ethylenediamine, 3-picoline, triethanolamine, triethylamine, and diisopropylamine, and
- the transition metal compound being selected from at least one titanium compound, wherein the titanium compound is selected from TiCl3, TiCl4, Ti(OBu)4, Ti(OBu)Cl3, Ti(OBu)2Cl2, and Ti(OBu)3Cl.
A catalyst for polymerizing at least one olefin comprising a product of a reaction between a catalyst component and an aluminum alkyl compound,
- the catalyst component comprising a product of a reaction between a transition metal compound and an adduct,
- the adduct comprising MgCl2, ethanol and a Lewis base (LB) different from water, said adduct further comprising a fusion enthalpy lower than 100 J/g, and formula MgCl2.(EtOH)n(LB)p, wherein n is from 2 to 6 and p is 0<p/(n+p)≦0.1, where the Lewis base is selected from ethers, esters, compounds of formula RXm, and combinations thereof, wherein RXm is selected from the group consisting of methanol, propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, pentanol, 2-methyl-1-pentanol, 2-ethyl-1-hexanol, phenol, 4-methyl-1-phenol, 2,6-dimethyl-1-phenol, cyclohexanol, cyclopentanol, ethylene glycol, propylene glycol, 1,4-butanediol, glycerine, mannitol, polyvinyl-alcohol, acetonitrile, ethylenediamine, 3-picoline, triethanolamine, triethylamine, and diisopropylamine, and
- the transition metal compound being selected from at least one titanium compound, wherein the titanium compound is selected from TiCl3, TiCl4, Ti(OBu)4, Ti(OBu)Cl3, Ti(OBu)2Cl2, and Ti(OBu)3Cl.
Dependencies are inferred from the claim text.