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    13.
    发明专利
    未知

    公开(公告)号：NO167984B

    公开(公告)日：1991-09-23

    申请号：NO875046

    申请日：1987-12-03

    Applicant: BASF AG

    Inventor： KANNE FRIEDRICH ,  MIETZNER FRANZ GEORG ,  PFLEGER KLAUS ,  KURSAWE SIEGFRIED ,  BOETTCHER KLAUS ,  ARNOLD GERHARD

    IPC: B01J19/00 ,  C08F2/00 ,  C08F2/34 ,  C08F6/00 ,  C08F10/00 ,  C08F10/02

    Abstract: The pressure in a continuous high pressure polymerization system, in which ethylene, with or without comonomers, is polymerized under high pressures and temperatures and the unconverted amounts of gas are recycled through the high pressure recycle gas system into the polymerization system, is rapidly reduced to below the particular reaction pressure when predetermined limiting pressure and/or temperature values are exceeded or when other faults occur by opening one or more pressure-relief apparatuses mounted on the high pressure polymerization system and transferring the hot let-down reaction mixture from the polymerization system via one or more let-down lines through one or more separator systems into the atmosphere, by a process in which the high pressure polymerization system is divided into a plurality of isolated sections at the same time as the let-down process is triggered and only the section in which the let-down process is triggered is let down to the atmosphere. Preferably, the sections in which the let-down process is not triggered can be let down into the high pressure recycle gas system, if necessary through a product separator, in synchronization with triggering of the let-down to the atmosphere.

    15.
    发明专利
    未知

    公开(公告)号：DE3787310D1

    公开(公告)日：1993-10-14

    申请号：DE3787310

    申请日：1987-05-07

    Applicant: BASF AG

    Inventor： PFLEGER KLAUS DR ,  BOETTCHER KLAUS DR ,  BUECHNER OSKAR DR ,  KANNE FRIEDRICH DR ,  KURSAWE SIEGFRIED

    IPC: C08F2/00 ,  C08F2/38 ,  C08F210/00 ,  C08F210/02

    Abstract: Copolymers of ethylene with vinyl esters are prepared in a continuously operated tubular polymerization system at high pressure and temperatures by feeding a mixture of ethylene, vinyl ester, initiator and, if appropriate, regulant into the polymerization system in the form of a mainstream at the inlet point thereof and at the same time through two or more secondary streams downstream of the inlet point, secondary streams (I) being metered in at points where the reaction temperature has just exceeded a maximum temperature due to the heat of polymerization and secondary streams (II) at points which, relative to the direction of flow of the ethylene, are upstream of the feed points of secondary streams (I) and upstream of the respective maximum temperature.

    16.
    发明专利
    未知

    公开(公告)号：PT85858A

    公开(公告)日：1988-11-30

    申请号：PT8585887

    申请日：1987-10-02

    Applicant: BASF AG

    Inventor： KANNE FRIEDRICH ,  PFLEGER KLAUS ,  GLOMB HANS ,  BOETTCHER KLAUS ,  ARNOLD GERHARD ,  KURSAWE SIEGFRIED

    IPC: B01J3/04 ,  B01J8/00 ,  B01J19/00 ,  C08F2/00 ,  C08F2/34 ,  C08F6/00 ,  C08F6/28 ,  C08F10/00

    Abstract: Separating system (1 to 11) for tubular reactors or autoclaves used for the polymerisation of ethylene or copolymerisation of ethylene with ethylenically unsaturated comonomers in the presence of initiators at pressures of from 500 to 4000 bar and temperatures of from 150 to 350 DEG C, for reducing the emission of solids during relaxation processes of the reaction mixture present in the reactor or autoclave, characterised in that the relaxed reaction mixture is passed through at least two separating tanks (1, 1a) installed in series, before reaching the atmosphere.

    17.
    发明专利
    未知

    公开(公告)号：DE3641513A1

    公开(公告)日：1988-06-09

    申请号：DE3641513

    申请日：1986-12-04

    Applicant: BASF AG

    Inventor： KANNE FRIEDRICH DR ,  MIETZNER FRANZ GEORG DR ,  PFLEGER KLAUS DR ,  KURSAWE SIEGFRIED ,  BOETTCHER KLAUS DR ,  ARNOLD GERHARD

    IPC: B01J19/00 ,  C08F2/00 ,  C08F2/34 ,  C08F6/00 ,  C08F10/00 ,  C08F10/02

    Abstract: The pressure in a continuous high pressure polymerization system, in which ethylene, with or without comonomers, is polymerized under high pressures and temperatures and the unconverted amounts of gas are recycled through the high pressure recycle gas system into the polymerization system, is rapidly reduced to below the particular reaction pressure when predetermined limiting pressure and/or temperature values are exceeded or when other faults occur by opening one or more pressure-relief apparatuses mounted on the high pressure polymerization system and transferring the hot let-down reaction mixture from the polymerization system via one or more let-down lines through one or more separator systems into the atmosphere, by a process in which the high pressure polymerization system is divided into a plurality of isolated sections at the same time as the let-down process is triggered and only the section in which the let-down process is triggered is let down to the atmosphere. Preferably, the sections in which the let-down process is not triggered can be let down into the high pressure recycle gas system, if necessary through a product separator, in synchronization with triggering of the let-down to the atmosphere.

    19.
    发明专利
    未知

    公开(公告)号：NO875046D0

    公开(公告)日：1987-12-03

    申请号：NO875046

    申请日：1987-12-03

    Applicant: BASF AG

    Inventor： KANNE FRIEDRICH ,  MIETZNER FRANZ GEORG ,  PFLEGER KLAUS ,  KURSAWE SIEGFRIED ,  BOETTCHER KLAUS ,  ARNOLD GERHARD

    IPC: B01J19/00 ,  C08F2/00 ,  C08F2/34 ,  C08F6/00 ,  C08F10/00 ,  C08F10/02 ,  C08F

    Abstract: The pressure in a continuous high pressure polymerization system, in which ethylene, with or without comonomers, is polymerized under high pressures and temperatures and the unconverted amounts of gas are recycled through the high pressure recycle gas system into the polymerization system, is rapidly reduced to below the particular reaction pressure when predetermined limiting pressure and/or temperature values are exceeded or when other faults occur by opening one or more pressure-relief apparatuses mounted on the high pressure polymerization system and transferring the hot let-down reaction mixture from the polymerization system via one or more let-down lines through one or more separator systems into the atmosphere, by a process in which the high pressure polymerization system is divided into a plurality of isolated sections at the same time as the let-down process is triggered and only the section in which the let-down process is triggered is let down to the atmosphere. Preferably, the sections in which the let-down process is not triggered can be let down into the high pressure recycle gas system, if necessary through a product separator, in synchronization with triggering of the let-down to the atmosphere.

    20.
    发明专利
    未知

    公开(公告)号：DE3615563A1

    公开(公告)日：1987-11-12

    申请号：DE3615563

    申请日：1986-05-09

    Applicant: BASF AG

    Inventor： PFLEGER KLAUS DR ,  BOETTCHER KLAUS DR ,  BUECHNER OSKAR DR ,  KANNE FRIEDRICH DR ,  KURSAWE SIEGFRIED

    IPC: C08F2/00 ,  C08F2/38 ,  C08F210/00 ,  C08F210/02 ,  C08F210/16

    Abstract: Copolymers of ethylene with vinyl esters are prepared in a continuously operated tubular polymerization system at high pressure and temperatures by feeding a mixture of ethylene, vinyl ester, initiator and, if appropriate, regulant into the polymerization system in the form of a mainstream at the inlet point thereof and at the same time through two or more secondary streams downstream of the inlet point, secondary streams (I) being metered in at points where the reaction temperature has just exceeded a maximum temperature due to the heat of polymerization and secondary streams (II) at points which, relative to the direction of flow of the ethylene, are upstream of the feed points of secondary streams (I) and upstream of the respective maximum temperature.

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