초록 ▼

A method and apparatus are disclosed for producing polyolefins by a fluidized gas phase polymerization process utilizing two stacked, substantially vertically aligned, reactors and a substantially vertical product transfer line for transfer of intermediate polyolefin polymer product from the polymer

A method and apparatus are disclosed for producing polyolefins by a fluidized gas phase polymerization process utilizing two stacked, substantially vertically aligned, reactors and a substantially vertical product transfer line for transfer of intermediate polyolefin polymer product from the polymerization zone of the upper reactor to the polymerization zone of the lower reactor. This abstract shall not be construed to define or limit in any way the scope of the invention, which is measured solely by the appended claims.

대표청구항 ▼

A dual reactor apparatus for gas phase polymerization of alpha-olefins, said apparatus comprising: first and second generally cylindrical reactors, said first reactor being positioned above said second reactor, each of said first and second reactors comprising a plenum zone in the lower portion ther

A dual reactor apparatus for gas phase polymerization of alpha-olefins, said apparatus comprising: first and second generally cylindrical reactors, said first reactor being positioned above said second reactor, each of said first and second reactors comprising a plenum zone in the lower portion thereof, a polymerization zone above said plenum zone and a disengaging zone above said polymerization zone, and having gas distribution means being provided between, and separating, said plenum zone and said polymerization zone in each reactor, said gas distribution means comprising a fixed, substantially conical, distribution plate pointing upwardly, said plate having a plurality of individual gas ports therein which ports comprise the only means for gas flow from said plenum zone to said polymerization zone and including means for controlling the orientation of flow of gas through each of said individual ports, whereby the flow of gas through said distribution plate and into said polymerization zone may be controlled for desired distribution; first and second catalyst supply means for supplying first and second polymerization catalysts to, respectively, said polymerization zones of said first and second reactors; first and second gas supply means for supplying, respectively, first and second polymerizable gas mixtures comprising one or more alpha-olefins to, respectively, said plenum zones of said first and second reactors; first and second gas recycle means for withdrawing first and second streams comprising primarily unreacted polymerizable gas from, respectively, the upper portions of said disengaging zones of said first and second reactors and supplying said withdrawn first and second stream as, respectively, first and second recycle streams to, respectively, said plenum zones of said first and second reactors; intermediate product transfer means for withdrawing intermediate polymer product from said polymerization zone of said first reactor and supplying said withdrawn intermediate polymer product to said polymerization zone of said second reactor; and final product transfer means for withdrawing final polymer product from said polymerization zone of said second reactor.