| 摘要 |
The invention relates to a process for polymerization, in gaseous phase, of one/some olefines. According to the invention, the process is carried out in a fluidized bed reactor, consisting of a first cylindric volume, whose enclosure or wall has at least a rotation surface generated by the rotation around a vertical axis as rotation axis, of a curve and/or rectilinear segment above which there is installed a second volume consisting of a separation tank placed above the cylinder at an absolute pressure higher than the atmospheric pressure. The separation tank is close to the first volume, whose enclosure or wall has alsoat least one rotation surface generated by the rotation around the same vertical axis, known as rotation axis, of a curve and/or rectilinear segment, which is carried out by continuously or intermitently introducing a catalyst into the reactor, continuously introducing olefin/olefins into a reaction gaseous mixture. The reaction gaseous mixture cooling takes place with the elimination of the formed polymer and the fluidized bed occupies at least the entire volume of the reactor. By the process claimed by the invention, one or more olefin monomers are polymerized , said monomers being chosen among ethylene, propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene and 1-octene, with a productivity higher than 50 kg/m3, preferably higher than 60 kg/h/m3.
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