Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1984-11-21
1986-01-14
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...
502114, 502115, 502132, 502134, 526125, 526151, 526153, C08F 464
Patent
active
045646058
ABSTRACT:
The invention relates to a process for preparing supported catalysts for the copolymerization of ethylene with higher alpha-olefins, characterized in that a compound of a transition metal of Groups IV, V and VI of the Periodic Table of Elements, used at its maximum valency, is precipitated on to a support of magnesium chloride and possibly aluminum chloride by a reduction reaction in two stages, employing reducing agents selected for the first stage from among alkylaluminum dihalides, and for the second stage from among organo-metallic compounds with a higher reducing power than that of the alkylaluminum dihalides.
These catalysts are particularly well suited to the copolymerization in the gas phase of ethylene and higher alpha-olefins.
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Collomb-Ceccarini Joelle
Crouzet Pierre
BP Chemicals Limited
Garvin Patrick P.
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