Claims
- 1. A solid, hydrocarbon-insoluble alpha-olefin polymerization catalyst component comprises a product formed by:
- A. Forming a solution of a magnesium-containing species formed from a magnesium alkoxide and sulfur dioxide;
- B. Precipitating solid particles from such magnesium-containing solution by treatment with a transition metal halide and an organosilane having a formula: R.sub.n SiR'.sub.4-n wherein n=0 to 4 and wherein R is hydrogen or an alkyl, a haloalkyl or aryl radical containing one to about ten carbon atoms or a halosilyl radical or haloalkylsilyl radical containing one to about eight carbon atoms, and R' is OR a halogen:
- C. Reprecipitating such solid particles from a mixture containing a cyclic ether; and
- D. Treating the reprecipitated particles with a transition metal compound and an electron donor.
- 2. A solid, hydrocarbon-insoluble alpha-olefin polymerization catalyst component comprises a product formed by precipitating solid particles formed from a product of a magnesium alkoxide and sulfur dioxide in an alcohol by treatment with titanium tetrachloride and an organosilane having a formula: R.sub.n SiR'.sub.4-n, wherein n=1 to 4 and wherein R is hydrogen or an alkyl, haloalkyl or aryl radical containing one to about ten carbon atoms, or a halosilyl radical or haloalkylsilyl radical containing one to about eight carbon atoms, and R' is OR or a halogen and treating the resulting solid particles with titanium tetrachloride and an electron donor.
- 3. The catalyst component of claim 1 wherein the transition metal halide is titanium tetrachloride.
- 4. The catalyst component of claim 1 wherein the organosilane is trimethylchlorosilane, trimethylethoxysilane, dimethyldichlorosilane or tetraethoxysilane.
- 5. The catalyst component of claim 1 wherein the organosilane is tetraethoxysilane.
Parent Case Info
This is a division of U.S. Ser. No. 351,408, filed on May 12, 1989 which is a division of U.S. Ser. No. 186,359, filed on Apr. 25, 1988, now U.S. Pat. No. 4,866,022, which is a continuation-in-part of U.S. Ser. No. 55,430, filed on May 28, 1987, now abandoned, which is a continuation-in-part of U.S. Ser. No. 875,180, filed June 17, 1986, now abandoned, which is a continuation-in-part of U.S. Ser. No. 741,858, filed June 6, 1985, now U.S. Pat. No. 4,612,299, which is a continuation-in-part of U.S. Ser. No. 629,106, filed July 9, 1984, now abandoned, which is a continuation-in-part of U.S. Ser. No. 592,910, filed Mar. 23, 1984, now U.S. Pat. No. 4,540,679.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4866022 |
Arzoumanidis et al. |
Sep 1989 |
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Divisions (2)
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Number |
Date |
Country |
Parent |
351408 |
May 1989 |
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Parent |
186359 |
Apr 1988 |
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Continuations (1)
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Number |
Date |
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Parent |
55430 |
May 1987 |
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Continuation in Parts (4)
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Number |
Date |
Country |
Parent |
875180 |
Jun 1986 |
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Parent |
741858 |
Jun 1985 |
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Parent |
629106 |
Jul 1984 |
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Parent |
592910 |
Mar 1984 |
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