METHOD AND DEVICE FOR GAS-PHASE POLYMERIZATION Russian patent published in 2004 - IPC

FIELD: polymerization of α--olefines. SUBSTANCE: the invention presents a method and a device for the gasphase catalytic polymerization conducted in two interconnected zones of polymerization, in which one or several monomers are fed at presence of a catalytic agent in the process of polymerization and from which the produced polymer is unloaded. Growing particles of the polymer are moving upwards through the first zone of polymerization under conditions of quick fluidization, leave the indicated first zone and enter the other zone of polymerization, through which they are moving in the dense form under action of gravitation forces, leave the indicated second zone and again are fed into the first zone of polymerization so providing circulation of the polymer between these two zones of polymerization. A special feature of the invention is that composition of the gas introduced into the second zone of polymerization differs from composition of the gas present in first to zone of polymerization, avoiding penetration of the gas from the first zone of polymerization into the second zone of polymerization. EFFECT: the method is in particular fit for production of the olefinic polymers mixtures with different compositions prepared in the reactor. 22 cl, 45 ex, 7 tbl, 4 dwg