PROCESS FOR PRODUCTION OF ETHYLENE POLYMERS

Production of ethylene polymers comprises catalytic polymerization or copolymerization of ethylene with one or more lower olefins. Process comprises polymerization or copolymerization of ethylene with one or more 3-8C olefins, in contact with chromium-based catalyst, deposited on silica support and...

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Bibliographic Details
Main Authors DEWAELE NICOLE DEWAELE NICOLE, FREDERICKX MARTINE FREDERICKX MARTINE, LHOST OLIVIER LHOST OLIVIER, KAISIN JOEL KAISIN JOEL
Format Patent
LanguageEnglish
Published 28.03.2001
Edition7
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:Production of ethylene polymers comprises catalytic polymerization or copolymerization of ethylene with one or more lower olefins. Process comprises polymerization or copolymerization of ethylene with one or more 3-8C olefins, in contact with chromium-based catalyst, deposited on silica support and subjected, in sequence, to the thermal treatment in nitrogen (preferably for 10 minutes to 20 hours) at temperature from above 350 degrees C to below 850 degrees C, followed by thermal treatment in air (preferably for 5 minutes to 6 hours) at above 350 degrees C to below 800 degrees C, before being brought into contact with ethylene and optionally one or more olefins under conditions of polymerization, to produce ethylene polymer.
Bibliography:Application Number: HUP0001215