FIELD: catalyst preparation methods.
SUBSTANCE: invention provides method for preliminary activation of catalysts for polymerization of C2-C20-olefins, wherein catalyst is first mixed with suitable monomer and then, if necessary, a relevant co-catalyst is added and resulting mixture is subjected to pre-polymerization in tubular reactor under turbulent stream conditions with Reynolds number at least 5000 and mean residence times between 1 and 5 min, after which thus preactivated catalyst is charged into actual polymerization reactor.
EFFECT: increased productivity and stability of polymerization over a very long period of time and improved morphology in thus produced polymers.
8 cl, 3 tbl, 4 ex
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| GAS-PHASE POLYMERIZATION OF OLEFINS UTILIZING A DOUBLE CATALYTIC SYSTEM | 2002 |
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| DICARBONATE COMPOUNDS WITH TWO BRIDGING ATOMS AS INTERNAL DONORS IN CATALYSTS FOR POLYPROPYLENE PRODUCTION | 2010 |
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