Alumina-based adsorbents for the purification of polyolefins
AssigneeRhone-Poulenc Chimie
InventorsEric Garcin, Claude-Bernard Cartier, Eric Quemere
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Abstract
Alumina-based adsorbents containing at least one compound of an alkali or alkaline earth metal, wherein the alkali or alkaline earth metal values are present in an amount ranging from 15 mmole to 100 mmole per 100 g of alumina, are useful for the adsorptive purification of polyolefins prepared by the polymerization of olefins in the presence of a metallic coordination catalyst, to remove contaminating catalyst metal values therefrom with but negligible monomer/solvent isomerization.
Claims9
In a process for the adsorptive purification of a polyolefin prepared by the polymerization of an olefin in the presence of a metallic coordination catalyst, to remove contaminating catalyst metal values therefrom, which comprises utilizing as the adsorbent therefore, an alumina substrate having incorporated therein at least one compound of an alkali or alkaline earth metal, said alkali or alkaline earth metal values being present therein in an amount ranging from 15 mmole to 100 mmole per 100 g of alumina substrate.
Dependencies are inferred from the claim text.