B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/109, 402/638
B01J 31/38 (2006.01) C08F 4/64 (2006.01)
Patent
CA 1174227
ABSTRACT OF THE DISCLOSURE Olefins are polymerized in the presence of a catalyst prepared by reacting trivalent or tetravalent titanium compounds such as a titanium trichloride or a titanium tetraalkoxide, zirconium compounds such as tri-n-butoxy zirconium chloride, an organomagnesium component such as di-n-hexyl magnesium, a halogen source such as ethyl aluminum dichloride and an organo- aluminum compound if the halide source or magnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing these catalyst compositions do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions and, at higher zirconium amounts, lower melt indices than do corresponding catalysts without the zirconium compound.
393402
Lowery Kirby Jr.
Shipley Randall S.
Smart & Biggar
The Dow Chemical Company
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