Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1992-02-26
1993-11-02
Garvin, Patrick P.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502104, 502113, 526114, 526116, C08F 4685, C08F 4646
Patent
active
052583422
ABSTRACT:
A process for the preparation of a solid component of a catalyst active in the (co)polymerization of ethylene and able to form (co)polymers of ethylene having from middle to wide distribution of molecular weight and monomodal distribution of molecular weights, in processes operating in a single step, in suspension or in the gaseous phase. Said solid component of a catalyst contains magnesium, chlorine, silicon, titanium and at least another transition metal on a solid, granular and porous carrier and is obtained by treating the carrier, in succession, with: a compound of a metal selected from hafnium, zirconium or vanadium; a magnesium dialkyl or magnesium alkyl halide; a silicon chloride; and a titanium compound.
REFERENCES:
patent: 4324691 (1982-04-01), Hartshorn et al.
patent: 4554265 (1985-11-01), Graves
patent: 4562170 (1985-12-01), Graves
patent: 4578373 (1986-03-01), Graves
patent: 4618660 (1986-10-01), Graves
Invernizzi Renzo
Luciani Luciano
Milani Federico
Pondrelli Maddalena
ECP Enichem Polimeri S.R.L.
Garvin Patrick P.
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