Process for Preparing a Catalyst Component for Propylene Polymerization
First Claim
1. A process for preparing a polymerization catalyst component comprising the steps ofi) contacting a compound R4zMgX2-z wherein R4 is an organic group, X is a halide, and z is larger than 0 and smaller than 2, with an alkoxy- or aryloxy-containing silane compound to give a solid magnesium-containing compound of formula Mg(OR1)xCl2-x wherein x is larger than 0 and smaller than 2, and each R1, independently, represents an alkyl group;
- ii) contacting the solid Mg(OR1)xCl2-x with at least one activating compound selected from the group formed by internal electron donors and compounds of formula M(OR2)v-w(R3)w, wherein M can be Ti, Zr, Hf, Al or Si, each R2 and R3, independently, represent an alkyl, alkenyl or aryl group, v is the valency of M and w is smaller than v, in the presence of an inert dispersant to give an intermediate reaction product, andiii) contacting the intermediate reaction product with a halogen-containing Ti-compound.
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Abstract
The invention relates to a process for preparing a polymerization catalyst component wherein a solid compound with formula Mg(OR1)xCl2-x wherein x is larger than 0 and smaller than 2, and each R1, independently, represents an alkyl group, said compound being obtained by reacting a Grignard compound with an alkoxy- or aryloxy-containing silane compound, is contacted with at least one activating compound selected from the group formed by internal electron donors and compounds of formula M(OR2)v-w(R3)w, wherein M can be Ti, Zr, Hf, Al or Si, each R2 and R3, independently, represent an alkyl, alkenyl or aryl group, v is the valency of M and w is smaller than v, in the presence of an inert dispersant to give an intermediate reaction product, and wherein the intermediate reaction product is contacted with a halogen-containing Ti-compound. A catalyst system comprising said component shows improved performance in olefin polymerization.
The invention also relates to a polymerization catalyst system comprising the catalyst component and to a process of making a polyolefin by contacting at least one olefin with a polymerization catalyst system comprising the catalyst component.
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Citations
13 Claims
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1. A process for preparing a polymerization catalyst component comprising the steps of
i) contacting a compound R4zMgX2-z wherein R4 is an organic group, X is a halide, and z is larger than 0 and smaller than 2, with an alkoxy- or aryloxy-containing silane compound to give a solid magnesium-containing compound of formula Mg(OR1)xCl2-x wherein x is larger than 0 and smaller than 2, and each R1, independently, represents an alkyl group; -
ii) contacting the solid Mg(OR1)xCl2-x with at least one activating compound selected from the group formed by internal electron donors and compounds of formula M(OR2)v-w(R3)w, wherein M can be Ti, Zr, Hf, Al or Si, each R2 and R3, independently, represent an alkyl, alkenyl or aryl group, v is the valency of M and w is smaller than v, in the presence of an inert dispersant to give an intermediate reaction product, and iii) contacting the intermediate reaction product with a halogen-containing Ti-compound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A polymerization catalyst system comprising a catalyst component prepared by:
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i) contacting a compound R4zMgX2-z wherein R4 is an organic group, X is a halide, and z is larger than 0 and smaller than 2, with an alkoxy- or aryloxy-containing silane compound to give a solid magnesium-containing compound of formula Mg(OR1)xCl2-x wherein x is larger than 0 and smaller than 2, and each R1, independently, represents an alkyl group; ii) contacting the solid Mg(OR1)xC2-x with at least one activating compound selected from the group formed by internal electron donors and compounds of formula M(OR2)v-w(R3)w, wherein M can be Ti, Zr, Hf, Al or Si, each R2 and R3, independently, represent an alkyl, alkenyl or aryl group, v is the valency of M and w is smaller than v, in the presence of an inert dispersant to give an intermediate reaction product, and iii) contacting the intermediate reaction product with a halogen-containing Ti-compound. and a co-catalyst. - View Dependent Claims (11)
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12. A process of making a polyolefin by contacting at least one olefin with a polymerization catalyst system prepared by:
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i) contacting a compound R4zMgX2-z wherein R4 is an organic group, X is a halide, and z is larger than 0 and smaller than 2, with an alkoxy- or aryloxy-containing silane compound to give a solid magnesium-containing compound of formula Mg(OR1)xCl2-x wherein x is larger than 0 and smaller than 2, and each R1, independently, represents an alkyl group; ii) contacting the solid Mg(OR1)xCl2-x with at least one activating compound selected from the group formed by internal electron donors and compounds of formula M(OR2)v-w(R3)w, wherein M can be Ti, Zr, Hf, Al or Si, each R2 and R3, independently, represent an alkyl, alkenyl or aryl group, v is the valency of M and w is smaller than v, in the presence of an inert dispersant to give an intermediate reaction product, and iii) contacting the intermediate reaction product with a halogen-containing Ti-compound. - View Dependent Claims (13)
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Specification
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- Resources
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Current AssigneeSaudi Basic Industries Corporation (Government of Saudi Arabia)
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Original AssigneeSaudi Basic Industries Corporation (Government of Saudi Arabia)
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InventorsTaftaf, Mansour, Zakharov, Vladimir Aleksandrovich, Ramjoie, Yves Johann Elizabeth, Vlaar, Mark, Friederichs, Nicolaas Hendrika, Sergeev, Sergei Andreevich, Bukatov, Gennadii Dimitrievich, Aburaqabah, Atieh
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current526/124.300
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CPC Class CodesC08F 10/00 Homopolymers and copolymers...C08F 110/06 PropeneC08F 2500/12 Melt flow index or melt flo...C08F 2500/18 Bulk densityC08F 2500/24 Polymer with special partic...C08F 4/6545 and metals of C08F4/64 or c...C08F 4/6548 magnesium or compounds ther...
