Rhone-poulenc Chimie

Eric Quemere

Claude-bernard Cartier

Eric Garcin

Claude-Bernard Cartier

Jean-Michel Popa

Bernard Pacaud

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.

Alumina-based adsorbents for the purification of polyolefins

Impure gaseous silane containing such impurities as, in particular, phosphines and arsines, is purified, whether by chemisorption and/or physical adsorption, by contacting such silane gas with a sorption mass that includes cooper values, e.g., a copper cation-exchanged molecular sieve.

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Villeneuve/Saint/Georges, France

Claude-Bernard Cartier