Process for preparing an ethylene polymerization catalyst and et

Details Process for preparing an ethylene polymerization catalyst and et Process for preparing an ethylene polymerization catalyst and et

1995-06-07

2000-10-17

Wu, David W.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502107, 5261246, B01J 3138

Patent

active

061331880

ABSTRACT:
A preparation process for a catalytic support, based on a special alumina modified with varying quantities of magnesium chloride is described, a higher rate of MgCl.sub.2 leading to a lesser quantity of heavy molecular chains in the final polymer. The support, prepared by milling the special alumina together with the MgCl.sub.2 previously treated with ethyl benzoate, is impregnated with TiCl.sub.4 in order to create the catalyst. The resulting catalysts show high activity, which enables the metallic residue and chloride eliminating stage to be avoided in the resin so created. Furthermore the types of molecular weight distribution and of mechanical properties are different for the polymers produced.

REFERENCES:
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patent: 4143223 (1979-03-01), Toyota et al.
patent: 4242231 (1980-12-01), Ueno et al.
patent: 4314911 (1982-02-01), Giannini et al.
patent: 4336352 (1982-06-01), Sakurai et al.

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