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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。

    Improvements in the recovery of organic products from waste gases
    7.
    发明专利
    Improvements in the recovery of organic products from waste gases 未知

    公开(公告)号：GB828674A

    公开(公告)日：1960-02-24

    申请号：GB3258

    申请日：1958-01-01

    Applicant: BASF AG

    Inventor： ALDINGER HUGO ,  KISSEL ERNST

    IPC: C07D201/16

    Abstract: A process for the recovery of high boiling point water-soluble organic substances from the waste gases from multi-stage steam jet vacuum apparatus consists in so selecting the condensation of the first jet stage that by indirect cooling down to about 0 DEG C. the propellant steam is almost completely condensed with a part of the organic substance, and the organic substance is washed out with the condensate of the first stage before the gas proceeds to the next jet stage. In an example, a gas containing caprolactam and originating from the condenser of a distillation plant enters a steam jet through a pipe where steam at 4.6 excess atmospheres is used. After cooling to 2 DEG C. there is obtained 11.95 kgs. per hour of a condensate containing 1.66 kgs. of caprolactam. This solution may be dehydrated together with the bulk of the distilled lactam coming from the distillation plant. By the intermediate cold water condensation the steam consumption in the second steam jet stage is diminished from 50 kgs. per hour at 3.5 excess atmospheres to 33 kgs. per hour at 4.5 atmospheres, and the amount of cooling water in the following injection condenser reduced from 6.8 cu. metres per hour to 3.5 cu. metres at a water temperature of 25 DEG C.

    8.
    发明专利
    未知

    公开(公告)号：DE956050C

    公开(公告)日：1957-01-10

    申请号：DEB0033502

    申请日：1954-11-25

    Applicant: BASF AG

    Inventor： KISSEL ERNST

    IPC: F28D7/02

    PROCESS AND APPARATUS FOR DRYING AND HEATING NYLON GRANULES
    9.
    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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