Manufacture of a modified titanium component for Ziegler-Natta c

Details Manufacture of a modified titanium component for Ziegler-Natta c Manufacture of a modified titanium component for Ziegler-Natta c

1974-12-16

1976-08-31

Poer, J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

B01J 3102

Patent

active

039779971

ABSTRACT:
A process for the manufacture of a modified titanium-containing component of a Ziegler-Natta catalyst for the polymerization of C.sub.3-6 .alpha.-monoolefins, wherein a specific titanium-containing compound and a specific phosphorus-containing compound are dry-milled at a specific grinding acceleration in a vibratory ball mill. The characteristic feature of the process of the invention is that a mill is used which has a specific useful volume and the mill is initially charged with a specific amount of the titanium-containing compound, which is milled at a low temperature while the phosphorus-containing compound is gradually added, whereupon milling is continued while the temperature of the process material is gradually raised to a specific value and maintained at said value for a specific period of time, whereupon, if desired, milling is again continued at a lower temperature for a specific period of time. In this manner, modified titanium-containing components are obtained which in the polymerization process produce highly reproducible yields of polymer.

REFERENCES:
patent: 3032510 (1962-05-01), Tornquist et al.
patent: 3216987 (1965-11-01), Price
patent: 3389129 (1968-06-01), Yamada et al.

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