초록 ▼

A process for the manufacture of olefin polymers in a continuous gas phase polymerization reaction wherein monomer, after passage through the fluidized bed, is cooled to a temperature below its dew point to produce a mixture of cold gas and liquid. All or nearly all of the cold gas is introduced int

A process for the manufacture of olefin polymers in a continuous gas phase polymerization reaction wherein monomer, after passage through the fluidized bed, is cooled to a temperature below its dew point to produce a mixture of cold gas and liquid. All or nearly all of the cold gas is introduced into the bottom of the reactor to serve as the fluidizing gas stream for the fluidized bed. Cold liquid, separated from the mixture, is either injected directly into the peripheral region around the fluidized bed or onto the walls of the expanded section of the reactor to form a liquid film flowing down the wall of the reactor or alternatively, the cold liquid is warmed to form a heated fluid by passing in indirect heat exchange relation with the fluidized bed and is then injected directly into the peripheral region of the fluidized bed or onto the wall of the expanded section of the reactor to form a downward flowing stream of cold liquid.

대표청구항 ▼

[ We claim:] [1.]1. A continuous process for the polymerization of a polymerizable olefin monomer or a mixture of two or more olefinic monomers by passing a gaseous stream comprised of an olefin monomer or a mixture of olefinic monomers through a fluidized bed in a reactor in the presence of a polym

[ We claim:] [1.]1. A continuous process for the polymerization of a polymerizable olefin monomer or a mixture of two or more olefinic monomers by passing a gaseous stream comprised of an olefin monomer or a mixture of olefinic monomers through a fluidized bed in a reactor in the presence of a polymerization catalyst under reactive conditions, to polymerize at least a portion of said olefin monomer or said mixture of olefinic monomers, which comprises:A. withdrawing a gaseous stream from said reactor which is comprised of at least some unreacted olefin monomer or at least some of said mixture of olefinic monomers,B. cooling at least a part of said gaseous stream withdrawn from said reactor to a temperature at or below that at which liquid condenses out of said stream,C. separating at least part of the condensed liquid from the cooled gaseous stream,D. continuously introducing at least a portion of said cooled gaseous stream into the said reactor, andE. injecting at least a part of said condensed liquid into the reactor onto a portion of the wall of the reactor which is above or generally peripheral to the said fluidized bed or into a peripheral region of said fluidized bed where the flow of polymer particles within the bed is primarily downward, toward the bottom of the reactor.