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    MULTISTAGE PROCESS FOR THE POLYMERIZATION OF ETHYLENE
    11.
    发明公开
    MULTISTAGE PROCESS FOR THE POLYMERIZATION OF ETHYLENE 有权
    多阶段过程乙烯的聚合

    公开(公告)号：EP2935353A1

    公开(公告)日：2015-10-28

    申请号：EP13802057.3

    申请日：2013-12-10

    Applicant: Basell Poliolefine Italia S.r.l.

    Inventor： MAUS, Andreas ,  MEIER, Gerhardus ,  COLLINA, Gianni ,  BRITA, Diego

    IPC: C08F10/02 ,  C08F2/00 ,  C08F2/14

    CPC classification number: C08F110/02 ,  C08F2/14 ,  C08F10/02 ,  C08F2/001 ,  C08F2500/07 ,  C08F2500/12 ,  C08F2500/14

    Abstract: The present invention relates to a slurry process for preparing an ethylene polymer having a melt flow ratio F/P, which is the ratio among the melt index value measured according to ASTM 1238 condition "F" and the melt index value measured according to ASTM 1238 condition "P" of equal to or lower than 27, carried out in two or more stages of polymerization at temperatures in the range from 60 to 120°C, in which at least two of the said two or more polymerization stages are carried out under different amounts of molecular weight regulator, said process being carried out in the presence of (A) a solid catalyst component comprising Ti, Mg, halogen, having a porosity (P F ), measured by the mercury method and due to pores with radius equal to, or lower than, 1µm, of at least 0.3 cm 3 /g and a surface area determined by BET method, of lower than 100 m 2 /g, and being further characterized by the fact that more than 50% of the titanium atoms are in a valence state lower than 4 and (B) of an organoaluminum compound.

    GAS-PHASE OLEFIN POLYMERIZATION PROCESS
    13.
    发明授权
    GAS-PHASE OLEFIN POLYMERIZATION PROCESS 有权
    方法的烯烃气相聚合

    公开(公告)号：EP1613668B1

    公开(公告)日：2012-08-08

    申请号：EP04725050.1

    申请日：2004-04-01

    Applicant: Basell Poliolefine Italia S.r.l.

    Inventor： PENZO, Giuseppe ,  MEI, Gabriele ,  MEIER, Gerhardus

    IPC: C08F10/00 ,  B01J8/24

    CPC classification number: B01J8/1827 ,  B01J8/1872 ,  B01J2208/00256 ,  B01J2208/00274 ,  B01J2208/003 ,  C08F10/00 ,  Y10S526/901 ,  Y10S526/918 ,  C08F2/01 ,  C08F2/34

    Abstract: A continuous process for the olefin polymerization in a fluidized bed reactor, said process comprising continuously passing a gaseous stream comprising one or more α-olefin monomers through the fluidized bed in the presence of a polymerization catalyst under reactive conditions, withdrawing polymeric product and unreacted fluids from the reactor, cooling part of said unreacted fluids below the dew point to form a two-phase mixture of gas and condensed liquid and reintroducing said two-phase mixture into the reactor, the process being characterized in that said two­phase mixture is reintroduced under the distribution plate of the reactor so that a part of condensed liquid is separated from the gas and is successively fed above the fluidized bed through an external pipe connecting the bottom of the reactor to a point situated above the upper limit of the fluidized bed of polymer particles.

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