PROCESS FOR REMOVAL OF RESIDUAL MONOMERS FROM ETHYLENE CO-POLYMERS

PROCESS FOR REMOVAL OF RESIDUAL MONOMERS FROM ETHYLENE CO-POLYMERS

Residual monomer is removed from copolymers of ethylene and higher olefins prepared in the gas phase by subjecting the copolymers to reduced pressure, sweeping the copolymers with reactor gas in the absence of inert gas and recycling the reactor gas containing residual monomers to the polymerization...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: ROBERT OLDS HAGERTY
Format: Patent
Sprache:eng
Schlagworte:
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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Beschreibung
Zusammenfassung:Residual monomer is removed from copolymers of ethylene and higher olefins prepared in the gas phase by subjecting the copolymers to reduced pressure, sweeping the copolymers with reactor gas in the absence of inert gas and recycling the reactor gas containing residual monomers to the polymerization zone. This method avoids the use of an inert sweep gas (e.g. nitrogen) and the step of separating the residual monomer from the inert gas.