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    PROCESS FOR DRAWING IN AND COMPRESSING GASES AND MIXING THE SAME WITH LIQUID MATERIAL
    14.
    发明专利
    PROCESS FOR DRAWING IN AND COMPRESSING GASES AND MIXING THE SAME WITH LIQUID MATERIAL 未知

    公开(公告)号：CA1059732A

    公开(公告)日：1979-08-07

    申请号：CA221067

    申请日：1975-02-27

    Applicant: BASF AG

    Inventor： NAGEL OTTO ,  KUERTEN HERIBERT ,  ZEHNER PETER

    IPC: B01F3/04 ,  B01F3/08 ,  B01F5/00 ,  B01F5/02 ,  F04F5/04 ,  F04F5/10 ,  F04F5/46 ,  F04F5/54 ,  B01J10/00

    Abstract: A process for drawing in and compressing gases and mixing the same with liquid which comprises propelling a jet of liquid from a propulsive nozzle which is shaped to provide an outlet region of minimum cross-sectional area, causing the resulting jet to become premixed with the gas in a coaxially arranged mixing nozzle which is situated downstream of the propulsive nozzle and is shaped to provide an outlet region of minimum cross-sectional area and minimum hydraulic diameter, and introducing the resulting premix into a region of minimum cross-sectional area of a coaxial, open-ended tube located in a body of the liquid, whereby the premix becomes admixed with liquid in the tube and with liquid drawn into the open inlet end thereof as a result of the flow of the premix and whereby compression of the gas in the premix occurs, in which process (a) the liquid jet from the propulsive nozzle has a speed of 10 to 70 m/sec, (b) the distance between the regions of minimum cross-sectional area of the propulsive nozzle and mixing nozzle is from 1 to 10 times the minimum hydraulic diameter of the mixing nozzle, (c) the minimum cross-sectional area of the mixing nozzle is from 1.5 to 15 times the minimum cross-sectional area of the propulsive nozzle, (d) the minimum cross-sectional area of the tube located in the body of liquid is from 1.2 to 20 times the minimum cross-sectional area of the mixing nozzle, and (e) the length of the region of minimum cross-sectional area of the tube located in the body of liquid is up to 20 times the hydraulic diameter of the tube in that region.

    PROCESS AND APPARATUS FOR THE MANUFACTURE OF FIBRIDS OF THERMOPLASTICS MATERIALS
    15.
    发明专利
    PROCESS AND APPARATUS FOR THE MANUFACTURE OF FIBRIDS OF THERMOPLASTICS MATERIALS 未知

    公开(公告)号：CA1044868A

    公开(公告)日：1978-12-26

    申请号：CA164617

    申请日：1973-02-23

    Applicant: BASF AG

    Inventor： KUERTEN HERIBERT ,  NAGEL OTTO ,  SINN RICHARD ,  WEINLE WERNER ,  ENGLER PETER

    IPC: D01D5/11 ,  D01D5/26 ,  D01D5/40 ,  D01F11/04

    Abstract: A process for the manufacture of fibrids of a thermoplastic organic polymer material which comprises extruding strands of molten thermoplastic organic polymer material through orifices of die means/and introducing a propulsive jet of liquid flowing from a nozzle located in the center of said die means at a velocity of from 10 to 100 meters per second and flowing in the same direction as said strands with in a liquid-filled zone surrounding said orifices, passing said strands, the propulsive jet and entrained liquid immediately and directly into and through a tubular impulse exchange zone having a mean diameter of from 2 to 20 times the diameter of said nozzle of said propulsive jet and a length of from 2 to 30 times its hydraulic diameter to provide shear stresses acting on said strands within said impulse exchange zone, and causing said strands of thermoplastic organic polymer material to solidify by the cooling of said melt by said liquid and to be broken up into fibrids by said shear stresses within said impulse exchange zone. The invention also relates to an apparatus for carrying out the above process. This apparatus consists of a container filled with liquid, a nozzle for melt of said thermoplastic organic polymer material and which surrounds a nozzle or nozzles for the propulsive jet projecting parallel into said container and a tube having a diameter from 2 to 20 times the diameter of the nozzles for the propulsive jet and having a length from 2 to 30 times its hydraulic diameter, said tube being disposed at a short distance from the die orifices coaxially with an imaginary extension of the axis of the die so that said tube can accommodate the propulsive jet and the extruded thermoplastic organic polymer material leaving said die orifices. The orifices for the molten plastics material comprise a circle of round nozzles disposed around a propulsive nozzle or in the form of arcuate slots disposed concentrically with said propulsive nozzle.

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