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    12.
    发明专利
    未知

    公开(公告)号：DE3612376A1

    公开(公告)日：1987-10-15

    申请号：DE3612376

    申请日：1986-04-12

    Applicant: BASF AG

    Inventor： MUELLER-MALL RUDOLF DR ,  FUNK GUIDO DR ,  BACHL ROBERT DR ,  HENNENBERGER PETER DR ,  KOLK ERICH DR

    IPC: C08F2/06 ,  C08F2/14 ,  C08F2/18 ,  C08F10/02 ,  C08F210/16

    Abstract: A process for the continuous preparation of finely divided homopolymers and copolymers of ethene by catalytic polymerization in a circular tube reactor using a liquid alkane as reaction medium in which the ethene or ethene/comonomer mixture to be polymerized is present in dissolved form and the polymer formed is present in suspended form and running the reaction mixture as a cycle stream to which the feed materials are added by bleeding in and from which the polymer formed is withdrawn by bleeding out reaction mixture, comprising (a) maintaining the mean concentration Cm of polymer in the cycle stream at a value within a certain range and (b) effecting the bleeding out of reaction mixture at a point of the cycle stream at which the concentration of polymer has a value which is lower than the mean concentration Cm by a distinct and definite amount.

    17.
    发明专利
    未知

    公开(公告)号：DE3776976D1

    公开(公告)日：1992-04-09

    申请号：DE3776976

    申请日：1987-04-03

    Applicant: BASF AG

    Inventor： MUELLER-MALL RUDOLF DR ,  FUNK GUIDO DR ,  BACHL ROBERT DR ,  HENNENBERGER PETER DR ,  KOLK ERICH DR

    IPC: C08F2/06 ,  C08F2/14 ,  C08F2/18 ,  C08F10/02 ,  C08F210/16

    Abstract: A process is claimed for the continuous prodn. of ethene homopolymer or copolymer (I) with sec. amts. of 3-8C alpha-olefins, of particle size 0.3-1.5 mm (DIN 53477) and bulk density 0.4-0.6 g/cm3 (DIN 53468), by catalytic polymerisation at 60-100 deg.C and 30-50 bar in a circular-tube reactor with 4-8C alkane as reaction medium contg. dissolved monomer(s) and suspended (I) and with a circulating reacton mixt. to which reactants are added and from which (I) is recovered by removal of mixt. The novelty is that the mean concn. of (I) (Cm) in the circulation is kept in the range 0.4-0.7 g per g reaction mxit. and that reaction mixt. is removed at a point in the cycle where the concn. of (I) is from 0.5Cm to 0.7Cm.

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