Process for polymerizing monomers in fluidized beds

The present invention relates to a gas fluidized bed polymerization process comprising passing a gaseous stream comprising olefin-type monomer through a fluidized bed reactor in the presence of a catalyst under reactive conditions to produce polymeric product and a stream comprising unreacted monome...

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Bibliographische Detailangaben
Hauptverfasser:	DECHELLIS, MARC LOUIS, GRIFFIN, JOHN, ROBERT
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The present invention relates to a gas fluidized bed polymerization process comprising passing a gaseous stream comprising olefin-type monomer through a fluidized bed reactor in the presence of a catalyst under reactive conditions to produce polymeric product and a stream comprising unreacted monomer gases, compressing and cooling said stream, mixing said stream with feed components and returning a gas and liquid phase to said reactor. The process further comprises cooling said stream such that the liquid phase is greater than 15 % by weight of the total weight of the returned stream and the stream composition is such that the ratio of fluidized bulk density to settled bulk density is over 0.59.