EP0292134A2
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EP
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Preparation of olefin polymerization catalyst component
Assignee: Shell USA Inc
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Filing: 1988-04-29
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Granted: —
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Expires: 2008-04-29
Abstract
Abstract Solid catalyst component for use in the polymerization of olefins and having improved activity and selectivity are prepared by: a) halogenating a magnesium compound containing at least one aryloxy, alkyl carbonate or alkyloxy group with a first halide of tetravalent titanium and a first electron donor; b1) contacting the resulting halogenated product with a second halide of tetravalent titanium; and c) washing a resulting treated halogenated product with an inert hydrocarbon liquid, wherein a second electron donor is used in step a) or step b1) and in that the product of step b1) is contacted in step b2 with a third halide of tetravalent titanium at a temperature of 40 DEG to 140 DEG C and thereafter the treated product is washed in step c). l
Inventors
- 👤 Robert Charles Job
- 👤 Steven Michael Nestlerode
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:42
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/42; C08F4/44; C08F4/46; C08F10/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
153 words
A process for preparing a solid catalyst component for use in the polymerization of olefins, which catalyst component contains magnesium, titanium and halogen and is prepared by the steps of: a) halogenating a magnesium compound of formula Mg R′R˝, wherein R′ is an alkoxy, alkyl carbonate or aryloxy group and R˝ is halogen or an alkyl, aryl, alkoxy, alkyl carbonate or aryloxy group with a first halide of tetravalent titanium and a first electron donor; b₁) contacting the resulting halogenated product with a second halide of tetravalent titanium; and c) washing a resulting treated halogenated product with an inert hydrocarbon liquid, characterised in that a second electron donor is used in step a) or step b₁) and in that the product of step b₁) is contacted in step b₂) with a third halide of tetravalent titanium at a temperature of 40° to 140°C and thereafter the treated product is washed in step c).
Claim 2
Dependent Claim
153 words
A process for preparing a solid catalyst component for use in the polymerization of olefins, which catalyst component contains magnesium, titanium and halogen and is prepared by the steps of: a) halogenating a magnesium compound of formula Mg R′R˝, wherein R′ is an alkoxy, alkyl carbonate or aryloxy group and R˝ is halogen or an alkyl, aryl, alkoxy, alkyl carbonate or aryloxy group with a first halide of tetravalent titanium and a first electron donor; b₁) contacting the resulting halogenated product with a second halide of tetravalent titanium; and c) washing a resulting treated halogenated product with an inert hydrocarbon liquid, characterised in that a second electron donor is used in step a) or step b₁) and in that the product of step b₁) is contacted in step b₂) with a third halide of tetravalent titanium at a temperature of 40° to 140°C and thereafter the treated product is washed in step c).
Claim 3
Dependent Claim
49 words
A process according to claim 1 wherein step a) comprises halogenating the magnesium compound with the first halide of tetravalent titanium and first electron donor until alogenation is eventually complete thereby forming an intermediate product which is not isolated, and contacting the intermediate product with the second electron donor.
Claim 4
Dependent Claim
24 words
A process according to claim 1 or 2 wherein the first electron donor is isobutyl phthalate and the second electron donor is ethyl benzoate.
Claim 5
Dependent Claim
21 words
A process according to claim 1,2 or 3 wherein the halogenation in step a) is conducted in the presence of halohydrocarbon.
Claim 6
Dependent Claim
11 words
A process according to claim 4 wherein the halohydrocarbon is chlorobenzene.
Claim 7
Dependent Claim
36 words
A process according to any one of the preceding claims wherein the amount of first electron donor is between 10 and 15 percent by weight, based on the weight of the halogenated product of step a).
Claim 8
Dependent Claim
31 words
A process according to claim 6 wherein the amount of the second electron donor is between 2 and 50 percent by weight, based on the weight of the first electron donor.
Claim 9
Dependent Claim
28 words
A process according to any one of the preceding claims wherein different halides of tetravalent titanium are used in at least two of steps a), b₁) and b₂).
Claim 10
Dependent Claim
29 words
A process according to any one of the preceding claims wherein titanium tetrachloride is used as at least one of the first, second and third halide of tetravalent titanium.
Claim 11
Dependent Claim
32 words
A process according to any one of the preceding claims wherein the treated halogenated product from step b₂) is treated again with a halide of tetravalent titanium before the washing step c).
Claim 12
Dependent Claim
35 words
A process according to claim 10 wherein the halide of tetravalent titanium used in the additional treatment step is the same as at least one of the first, second and third halide of tetravalent titanium.
References Cited (Backward Citations)
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