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

1994-12-14

2000-01-25

Wu, David W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5261243, 526352, 502105, 502120, C08F 464

Patent

active

060180064

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:
patent: 4069169 (1978-01-01), Toyoda et al.
patent: 4143223 (1979-03-01), Toyota et al.
patent: 4314911 (1982-02-01), Giannemi et al.
patent: 4336352 (1982-06-01), Sakurai et al.
Boor, Ziefer -Catalysts and Polymerizations, Academic Press. N.Y. (1979) pp. 602-609.

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