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    PROCESS FOR PRODUCING POLYAMIDES FROM AMINONITRILES
    2.
    发明申请
    PROCESS FOR PRODUCING POLYAMIDES FROM AMINONITRILES 审中-公开
    一种从氨基腈PRODUCING聚酰胺

    公开(公告)号：WO9808889A2

    公开(公告)日：1998-03-05

    申请号：PCT/EP9704640

    申请日：1997-08-26

    Applicant: BASF AG ,  WEISS ROBERT ,  KRAUSS DIETER ,  KELLER DIETER ,  PIPPER GUNTER ,  HARDER WOLFGANG ,  LUDWIG ALFONS ,  MOHRSCHLADT RALF

    Inventor： WEISS ROBERT ,  KRAUSS DIETER ,  KELLER DIETER ,  PIPPER GUNTER ,  HARDER WOLFGANG ,  LUDWIG ALFONS ,  MOHRSCHLADT RALF

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/08 ,  C08G69/28 ,  C08G69/36

    CPC classification number: C08G69/04 ,  C08G69/08 ,  C08G69/28 ,  C08G69/36

    Abstract: A process for producing a polyamide by reacting at least one aminonitrile with water has the following steps: (1) at least one aminonitrile is reacted with water at a temperature from 100 to 360 DEG C and pressure from 0.1 to 35.x 10 Pa, yielding a reaction mixture; (2) the reaction mixture is further reacted at a temperature from 150 to 400 DEG C and pressure lower than the pressure in step 1. The temperature and pressure are selected to yield a first gaseous phase and a first liquid or solid phase or a mixture of a first solid and a first liquid phase. The first gaseous phase is separated from the first liquid or solid phase or the mixture of a first liquid and a first solid phase is separated; and (3) the first liquid or solid phase or the mixture of a first liquid and first solid phase is mixed with a water-containing gaseous or liquid phase at a temperature from 150 to 360 DEG C and pressure from 0.1 to 30 x 10 Pa, yielding a product mixture. Also disclosed are other embodiments of this process and the thus produced polyamides.

    Abstract translation: 一种用于通过至少一个氨基腈与水反应，包括下列步骤制备聚酰胺过程：（1）在100至360摄氏度的温度和0.1〜35×10的压力<至少一个氨基腈与水反应 6> Pa至获得得到的反应混合物，（2）进一步在150〜400℃和压力是比在步骤1中的压力更低的温度下的反应混合物反应，所述温度和压力被选择为使得 该第一气相和第一液体或第一固相或第一固体和第一液相的混合物获得，并从所述第一液体或第一固相或第一液体和第1固相的混合物中的第一气体相分离出 是，（3）将第一液体或第一固相或第一液体和第1固相的与气态或混合物 含有液体相包含水，在150〜360℃的温度和0.1〜30×10 <6> Pa的压力以获得产物混合物中获得，以及这样的方法的其它实施例中，将如此制备的 聚酰胺本身。

    APPLICATION OF COIL TUBE EVAPORATORS FOR THE PRODUCTION OF POLYAMIDES
    5.
    发明专利
    APPLICATION OF COIL TUBE EVAPORATORS FOR THE PRODUCTION OF POLYAMIDES 未知

    公开(公告)号：CA2666422A1

    公开(公告)日：2008-05-02

    申请号：CA2666422

    申请日：2007-10-19

    Applicant: BASF AG

    Inventor： WEISS ROBERT ,  BECKER JENS

    IPC: C08G69/04 ,  C08G69/16 ,  C08G69/18 ,  C08G69/46

    Abstract: The invention relates to the use of coil tube evaporators for concentrati ng aqueous extract solutions from the extraction of polyamides based on poly amide (6). A method for the production of polyamides based on polyamide (6) comprises the steps (b) one-phase or two-phase reaction of aqueous extract s olutions from the extraction of polyamides based on polyamide (6), which are possibly enriched with caprolactam, aminocapronitrile, aminocaproic acid, o r mixtures thereof, in a pre-reactor at pressures in the range of 5 to 40 ba r and temperatures in the range of 150 to 300°C, wherein in the two-phase re action, the evolved gaseous phase can be separated from the liquid phase, c) discharge of the reaction mixture obtained from step b) by means of a coil tube evaporator at a temperature in the range of 220 to 300°C with a reducti on of pressure to approximately atmospheric pressure and separation of a gas eous phase, producing a liquid phase, d) further reaction of the liquid phas e obtained from step c) at temperatures in the range of 240 to 300°C and pre ssures in the range of atmospheric pressure to 2 bar, with a separation of a gaseous phase.

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