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    Extraction of polylactams
    2.
    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。

    Continuous mixing of bulk solids
    8.
    发明专利
    Continuous mixing of bulk solids 未知

    公开(公告)号：GB1060610A

    公开(公告)日：1967-03-08

    申请号：GB4888363

    申请日：1961-12-11

    Applicant: BASF AG

    Inventor： GUENTHER ERNST ,  NOE KURT ,  LINGE HERMANN ,  SCHAEFER EBERHARD

    IPC: B01F5/24

    Abstract: 1,060,610. Average-discharge mixing apparatus. BADISCHE ANILIN-& SODA FABRIK A. G. Dec. 11, 1963 [Dec. 18, 1962], No. 48883/63. Heading B1C. Bulk solids in a container 1 are mixed by being simultaneously withdrawn from several levels, the material from each level being separately supplied, as by pipes which end at different heights within the container, to a mixing zone 3. As shown, the pipes 2 are concentric and there is an annular space between the outermost pipe and the container wall. Other embodiments may comprise a single pipe divided longitudinally into sectors having apertures at different levels (see Fig. 2, not shown) or a member formed by spirally winding a triangular piece of material and inserting vertical partitions between the convolutions (see Fig. 3, not shown).

    EXTRACTION TUBE FOR POLYAMIDES
    9.
    发明专利
    EXTRACTION TUBE FOR POLYAMIDES 未知

    公开(公告)号：CA1066030A

    公开(公告)日：1979-11-13

    申请号：CA218338

    申请日：1975-01-21

    Applicant: BASF AG

    Inventor： HOERAUF WERNER ,  GUENTHER ERNST ,  KISSEL ERNST ,  VALENTIN GUENTER ,  DIETRICH ERNST

    IPC: C08G69/00 ,  B01D11/00 ,  B01D11/02 ,  C08G69/04 ,  C08G69/46 ,  B01J8/08

    Abstract: An extraction tube for the continuous removal of low molecular weight components of polylactam granules by means of hot water by the countercurrent principle of operation, the water being fed upwardly and the granules downwardly, the tube being provided with inlets and outlets for the granules and the water and exhibiting baffles within the tube, wherein there is provided, within the tube, a heat exchanger which (a) divides the tube into two sections bearing a ratio to each other of from 50:50 to 85:15 by volume, the smaller section being at the top of the tube, (b) exhibits ducts for the granules over the entire cross-section of the tube and (c) has upper inlet surfaces leading into each duct on the upper side of said heat exchanger facing the stream of granules, said inlet surfaces being inclined to taper inwardly toward the vertical ducts at an angle .beta. to the horizontal, this angle being equal to or greater than the angle of repose of the granules but less than 90.degree., further similar heat exchangers being provided beneath said heat exchanger if desired.

    Continuous polycondensation of lactams
    10.
    发明专利
    Continuous polycondensation of lactams 未知

    公开(公告)号：GB1113357A

    公开(公告)日：1968-05-15

    申请号：GB3952465

    申请日：1965-09-16

    Applicant: BASF AG

    Inventor： GUENTHER ERNST ,  LINGE HERMANN ,  NOE KURT ,  PIRZER HANS

    IPC: B01J19/00 ,  B01J19/18 ,  C08G69/16

    Abstract: Lactams having 5-13 ring atoms are continously polymerized at atmospheric pressure in a vertical tube, the top portion of which contains a stirrer, the lactam in a molten state being added to the mixture of lactam and prepolymer at the top of the tube which is at the polymerization temperature. The top quarter of the tube may be 30-80% wider than the remainder and may contain a regulator for the lactam level and a heating coil. The remainder of the tube may contain a heat exchanger and a means for achieving uniform flow in the melt, e.g. a series of gratings. The lactam, e.g. e caprolactam may contain up to 15% water and other additives, e.g. pigments, catalysts, fillers, master batches and stabilizers. The polymerization temperature may be 240-280 DEG C.

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