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A GAS PHASE POLYMERIZATION PROCESS COMPRISING COMBINING HYDROGEN, ETHYLENE AND A SUPPORTED BIMETALLIC CATALYST SYSTEM IN A REACTOR
A GAS PHASE POLYMERIZATION PROCESS COMPRISING COMBINING HYDROGEN, ETHYLENE AND A SUPPORTED BIMETALLIC CATALYST SYSTEM IN A REACTOR
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机译:反应器中由氢,乙烯和支持的双金属催化剂系统组成的气相聚合过程
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摘要
A gas phase polymerization process for producing a polyolefin composition is described, which includes passing a gaseous stream containing hydrogen gas and one or more monomers, including ethylene monomers, through a reactor that includes a I luidized bed, under reactive conditions, in the presence of a catalyst that includes metallocene, to provide a polyolefin composition, wherein in one embodiment the fluidized bulk density is 60% or more of the settled bulk density (or, a voidage of 40%' or less); and wherein the voidage is controlled by a number of factors including, in certain embodiments, (a) the reactor temperature being maintained at 100 °C or below; (b) the molar ratio of hydrogen gas to ethylene introduced into the reactor being 0.015 or below.
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