Tetra(neophyl) zirconium

Details Tetra(neophyl) zirconium Tetra(neophyl) zirconium

1975-07-30

1977-04-12

Sneed, Helen M. S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252430, 252431R, 526170, C07F 700

Patent

active

040175251

ABSTRACT:
There are disclosed olefin polymerization catalysts based on tetra(neophyl) zirconium and its reaction products with surface-hydroxylated oxides of metals of Groups II(a), III(a), IV(a) and IV(b) of the Periodic Table of the Elements, processes for their preparation, and processes for the polymerization of olefinic monomers employing such catalysts. Neophyl zirconium aluminate supported on alumina is disclosed as the preferred, most active catalyst. The polyolefins produced are linear high polymers of high crystallinity such as polyethylene and isotactic polypropylene. Diolefins are converted into rubber by use of the process employing the catalyst. Ethylene-propylene copolymer rubbers can also be produced by use of the catalysts.

REFERENCES:
patent: 3763197 (1973-10-01), Collier et al.
patent: 3813423 (1974-05-01), Pioli et al.
Chem. Abstracts, vol. 64, 14212e (1966).
Chem. Abstracts, vol. 64, 5131g (1966).

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