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    Extraction of polylactams
    1.
    发明授权
    Extraction of polylactams 失效
    聚内酰胺的提取

    公开(公告)号：US3905946A

    公开(公告)日：1975-09-16

    申请号：US39224473

    申请日：1973-08-28

    Applicant: BASF AG

    Inventor： NIESWANDT WERNER ,  HOERAUF WERNER ,  GUENTHER ERNST ,  KISSEL ERNST ,  NEUMANN ECKART ,  VALENTIN GUENTER

    IPC: C08G69/00 ,  B01D11/02 ,  C07D201/12 ,  C08G69/46

    CPC classification number: C08G69/46

    Abstract: Continuous extraction of polylactam granules for the removal of monomers and/or oligomers therefrom by means of hot water flowing countercurrently in an extraction zone, which extraction zone is divided into subzones by at least one heating zone and the water is accelerated, at certain time intervals, cocurrently and countercurrently to the flow of granules.

    Abstract translation: 连续提取多内酰胺颗粒以通过在提取区域中逆流流动的热水从其中除去单体和/或低聚物，该提取区通过至少一个加热区被分成次区域，并以特定的时间间隔加速水 与流动的流动并流逆流。

    PROCESS AND APPARATUS FOR ACHIEVING A UNIFORM FLOW PROFILE
    3.
    发明专利
    PROCESS AND APPARATUS FOR ACHIEVING A UNIFORM FLOW PROFILE 未知

    公开(公告)号：CA1083012A

    公开(公告)日：1980-08-05

    申请号：CA247615

    申请日：1976-03-10

    Applicant: BASF AG

    Inventor： HOERAUF WERNER ,  PIRZER HANS ,  GUENTHER ERNST ,  NEUMANN ECKART ,  DIETRICH ERNST

    IPC: F15D1/02 ,  F16K47/00

    Abstract: A process and apparatus for achieving a uniform flow profile of very viscous liquids when flowing through a tube or reaction chamber. The very viscous liquid is passed through at least two sets of annular spaces arranged at axial intervals within the tube or reaction chamber, the annular spaces of each set extending concentrically with increasing diameter over the entire cross-section of the tube or reaction chamber and having the same depth in the direction of flow, the annular spaces of two consecutive sets being staggered with respect to each other as viewed in the direction of flow. The apparatus of the invention consists of a combination of two or more discs arranged at axial intervals within a tube transversely to the direction of flow, each disc consisting of a plurality of ring-shaped bands of increasing diameter, the bands being arranged freely of one another and concentrically at intervals on a grid supporting means to provide correspondingly concentric open spaces between the bands over the entire cross-section of the tube, with the walls of the bands running parallel to the direction of flow, and the bands of the separate discs being staggered with respect to each other as viewed in the direction of flow.

    PROCESS AND APPARATUS FOR DRYING AND HEATING NYLON GRANULES
    4.
    发明专利
    PROCESS AND APPARATUS FOR DRYING AND HEATING NYLON GRANULES 未知

    公开(公告)号：CA1079959A

    公开(公告)日：1980-06-24

    申请号：CA255180

    申请日：1976-06-17

    Applicant: BASF AG

    Inventor： DIETRICH ERNST ,  GUENTHER ERNST ,  HOERAUF WERNER ,  KISSEL ERNST ,  LINGE HERMANN ,  NEUMANN ECKART ,  SCHAEFER EBERHARD

    IPC: C08G69/00 ,  B29B13/06 ,  F26B17/14 ,  F26B21/14 ,  F26B17/12

    Abstract: In a process for drying and heating nylon granules, in which the granules flow downwards through a vertical zone, hot inert gases which are free from molecular oxygen are passed in counter-current through the granules and the cooled granules are then intermittently discharged in part-streams, the improvement wherein the wet granules, or a suspension of the granules in water, are fed into the zone at the top, the granules are deposited as a layer, the water is led away, the layer of granules is then transferred into the next-lower part of the zone, the granules are there allowed to flow under gravity downwards through the zone, and inert gases which are free from molecular oxygen are passed in counter-current upwards through the granules at from 70 to 200.degree.C, with the proviso that the inert gas, before leaving the zone, is passed through the deposited layer Or granules, in the lower part of the zone the granules are divided into part-streams over the entire cross-section of the zone, these part-streams are cooled and the granules are passed intermittently, but simultaneously over the entire cross-section or the zone, into a discharge zone, with the proviso that the discharge zone is only partially filled, as well as an apparatus for carrying out the improved process.

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