Polyolefin production with different diluents in multiple polymerization reactors

摘要

A system and method for producing polyolefin, including a polyolefin reactor system having: a first reactor to produce a first reactor discharge stream having a first polyolefin and a first diluent; and a second reactor to receive at least a portion of the first reactor discharge stream and to produce a second reactor discharge stream having a second polyolefin and a second diluent, wherein the second diluent is different than the first diluent.

主权项

1. A method of operating a polyolefin reactor system, comprising:
polymerizing olefin in a first inert diluent in a first reactor to form a first polyolefin; discharging continuously from the first reactor a transfer slurry comprising the first polyolefin and the first inert diluent; processing the transfer slurry through a separator to form (1) a recycle stream comprising the first inert diluent and (2) a concentrated slurry comprising the first polyolefin; feeding the concentrated slurry to a second reactor; polymerizing olefin in a second inert diluent in the second reactor to form a second polyolefin; discharging from the second reactor a product slurry comprising the first polyolefin, the second polyolefin, and the second inert diluent; and wherein the first inert diluent and the second inert diluent are different, wherein process the transfer slurry comprises feeding the transfer slurry to a wash column or decanter.