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    Pressure-resistant screw extruder
    8.
    发明专利
    Pressure-resistant screw extruder 未知

    公开(公告)号：GB1058585A

    公开(公告)日：1967-02-15

    申请号：GB3329865

    申请日：1963-10-04

    Applicant: BASF AG

    Inventor： WISSEROTH KARL ,  TRIESCHMANN HANS GEORG ,  MOHR HEINRICH ,  REUTER LOTHAR ,  SCHOLL RICHARD

    IPC: B29C47/10 ,  B29C48/67 ,  B29C48/72 ,  C08F10/02 ,  C08F110/02 ,  C08F210/16 ,  C08F255/02 ,  C08F255/10

    Abstract: 1,058,585. Pug-mills. BADISCHE ANILIN- & SODA-FABRIK A. G. Oct. 4, 1963 [Oct. 6, 1962], No. 33298/65. Divided out of 1,058,584. Heading B1C. [Also in Division Fl]. Apparatus for polymerizing ethylene comprises a mixing chamber 1 having at least two inlets 3, a regulatable discharge means 2, and a screw 4 having an axial bore 5 open at the discharge end and communicating with the chamber 1 by means of apertures 6 or the inlet end; in operation part of the materials are recycled through the hollow screw. The apertures 6 may be radial or inclined and may open into the flanks of the screw-thread (see Fig. 2, not shown); they may be circular, oval or slotshaped. The apparatus has heating and cooling means (not depicted), and a thermocouple 9, it may discharge to a degassing screw and a granulating apparatus.

    Improvements in and apparatus for carrying out polymerization processes
    9.
    发明专利
    Improvements in and apparatus for carrying out polymerization processes 未知

    公开(公告)号：GB922400A

    公开(公告)日：1963-04-03

    申请号：GB377660

    申请日：1960-02-03

    Applicant: BASF AG

    Inventor： WISSEROTH KARL ,  TRIESCHMANN HANS GEORG ,  WEBER HEINRICH

    IPC: B01J8/10 ,  B01J19/00 ,  B01J19/18 ,  C08F2/00 ,  C08F10/00 ,  C08F10/02

    Abstract: In a process for withdrawing polymerization heat in continuous olefin polymerization processes in which gaseous olefins are used, which comprises supplying gaseous olefin reactant, with or without an additional non-polymerizable gaseous component under a pressure substantially higher than the pressure that prevails in the reactor, and expanding said compressed olefin (or olefin and said additional non-polymerizable component) through a throttle valve into the reactor, the reactor being arranged in a circulatory path for said olefin, whereby heat of polymerization is withdrawn by heat exchange after the olefin has left the reactor and before it is again supplied through said valve into the reactor, according to the parent Specification, the olefin is introduced into the reaction space immediately after pressure release in the form of directed jets continuously moving in the reaction space while the layer of polymer arising in powder form is simultaneously agitated by mechanical means. Apparatus suitable for carrying out the process of the invention is described and illustrated and may comprise a rotating stirrer and rotating nozzle heads secured to a common shaft the hollow base of which running in a hollow bearing provides a passage for supplying the monomer. Catalyst may be added either continuously or incrementally, and the product may be recovered by passing the material withdrawn from the reactor through a cyclone separator. The polymerization of ethylene is described in an example.

    A process for the production of polyethylene with a branched structure
    10.
    发明专利
    A process for the production of polyethylene with a branched structure 未知

    公开(公告)号：GB901148A

    公开(公告)日：1962-07-18

    申请号：GB802661

    申请日：1961-03-06

    Applicant: BASF AG

    Inventor： WISSEROTH KARL ,  REUTER LOTHAR ,  TRIESCHMANN HANS-GECRG

    IPC: C08F8/06

    Abstract: Linear polyethylene of molecular weight 5,000 to 50,000 is treated in melted form at temperatures between 160 DEG and 280 DEG C., with molecular oxygen or mixtures of nitrogen and oxygen, such as air, whereby polyethylene of branched structure is produced. The linear polyethylene used may be obtained by thermal degradation of a linear polyethylene of higher molecular weight, e.g. by heating linear polyethylene of molecular weight 430,000 at 350 DEG to 420 DEG C. under nitrogen. The products find application as film.

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