Process for preparing a diether-based catalyst component
First Claim
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1. A process for preparing a diether-based catalyst component comprising steps of:
- a) contacting a solid support comprising a magnesium halide or a precursor thereof, one or more 1,3-diethers and a liquid phase containing a titanium compound, thereby forming a slurry b) separating the slurry in a solid/liquid separation step, thereby isolating a diether-based solid catalyst component, wherein the solid/liquid separation step has a solid/liquid separation velocity, wherein a ratio between the solid/liquid separation velocity and the final amount of the separated solid catalyst component is higher than 0.5 liter/(min.Kg).
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Abstract
A process for preparing a diether-based catalyst component in which: a) a slurry is obtained by contacting a solid support comprising a magnesium halide or a precursor thereof, one or more 1,3-diethers and a liquid phase containing a titanium compound, and b) the obtained slurry is then subjected to a solid/liquid separation step in order to isolate a diether-based catalyst component; said separation step b) being characterized in that the ratio between the solid/liquid separation velocity and the final amount of separated solid must be higher than 0.5 liter/(min.Kg).
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20 Claims
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1. A process for preparing a diether-based catalyst component comprising steps of:
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a) contacting a solid support comprising a magnesium halide or a precursor thereof, one or more 1,3-diethers and a liquid phase containing a titanium compound, thereby forming a slurry b) separating the slurry in a solid/liquid separation step, thereby isolating a diether-based solid catalyst component, wherein the solid/liquid separation step has a solid/liquid separation velocity, wherein a ratio between the solid/liquid separation velocity and the final amount of the separated solid catalyst component is higher than 0.5 liter/(min.Kg). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20)
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19. A process for the homo- or co-polymerization of α
- -olefins of formula CH2═
CHR, wherein R is hydrogen or an alkyl, cycloalkyl, aryl, arylalkyl or alkylaryl radical with 1 to 12 carbon atoms, said process comprising a polymerization step carried out in the presence of catalyst systems comprising the solid catalyst component obtained by steps comprising;
a) contacting a solid support comprising a magnesium halide or a precursor thereof, one or more 1,3-diethers and a liquid phase containing a titanium compound, thereby forming a slurry;
b) separating the slurry in a solid/liquid separation step, thereby isolating a diether-based solid catalyst component, wherein the solid/liquid separation step has a solid/liquid separation velocity, wherein a ratio between the solid/liquid separation velocity and the final amount of the separated solid catalyst component is higher than 0.5 liter/(min.Kg).
- -olefins of formula CH2═
Specification