Patent ID: 6291602
Filing Date: 2001-09-18
Classification: C08F

Abstract:
Process for the polymerization of olefins, in which the olefin is polymerized, optionally with one or more co-monomers, in two reactors arranged in series, in the presence of a catalytic solid comprising chromium on a support which comprises a SiO.sub.2 --Al.sub.2 O.sub.3 --AlPO.sub.4 ternary support, and a co-catalyst, the first reactor being fed with ethylene and optionally with a first co-monomer and/or with hydrogen, and with catalytic solid, the reaction medium of the first reactor being transferred into the second reactor, the second reactor also being fed with ethylene and optionally with at least one second co-monomer which is the same or different from said first comonomer and/or with hydrogen, and the co-catalyst being present in at least one of the two reactors.