Claims
- 1. A process for the polymerization of an alpha olefin comprising contacting said alpha olefin under polymerization conditions with a catalyst prepared by reacting a hydrous magnesium dihalide composition with reactants comprising a benzoic acid ester and an alkoxytitanium compound to form a first catalyst component, then reacting said first catalyst component with an organoaluminum halide to form a solid product, then reacting said solid product with a halogenating agent comprising a titanium halide, wherein the molar ratio of water to magnesium dihalide in said hydrous magnesium dihalide composition is in the range of about 0.5/1 to 2/1 and the hydrous magnesium dihalide composition is prepared by comminuting a mixture of an anhydrous magnesium dihalide and a hydrous magnesium dihalide at least until the amount of the most highly hydrated magnesium dihalide species in the comminuted product has become substantially stabilized.
- 2. A process according to claim 1 wherein propylene is polymerized.
- 3. A process according to claim 2 wherein the molar ratio of water to magnesium dihalide in said hydrous magnesium dihalide composition is in the range of about 0.75/1 to about 1.50/1.
- 4. A process according to claim 1 wherein polyethylene is produced.
- 5. A process according to claim 4 wherein the molar ratio of water to magnesium dihalide in said hydrous magnesium dihalide composition is in the range of about 0.5/1 to about 0.75/1.
- 6. A process for the polymerization of an alpha olefin comprising contacting said alpha olefin under polymerization conditions with a catalyst prepared by reacting a hydrous magnesium dihalide composition with reactants comprising a benzoic acid ester and an alkoxytitanium compound to form a first catalyst component, then reacting said first catalyst component with an organoaluminum halide to form a solid product, then reacting said solid product with a halogenating agent comprising a titanium halide, wherein the molar ratio of water to magnesium dihalide in said hydrous magnesium dihalide composition is in the range of about 0.5/1 to 2/1 and the hydrous magnesium dihalide composition is prepared by comminuting a mixture of an anhydrous magnesium dihalide and a hydrous magnesium dihalide at least until the hydrous magnesium dihalide is substantially free of the tetra and hexa hydrates.
- 7. A process according to claim 6 wherein the anhydrous magnesium dihalide is MgCl.sub.2 containing less than 0.05 weight percent water and the hydrous magnesium dihalide is MgCl.sub.2 .multidot.6H.sub.2 O.
Parent Case Info
This application is a division of application Ser. No. 546,712, filed Oct. 28, 1983, now U.S. Pat. No. 4,520,121.
US Referenced Citations (3)
Foreign Referenced Citations (2)
Number |
Date |
Country |
45977 |
Feb 1982 |
EPX |
2102439 |
Feb 1983 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
546712 |
Oct 1983 |
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