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    VERFAHREN ZUR KONTINUIERLICHEN EXTRAKTION VON POLYAMID
    1.
    发明公开
    VERFAHREN ZUR KONTINUIERLICHEN EXTRAKTION VON POLYAMID 有权

    公开(公告)号：EP1030872A1

    公开(公告)日：2000-08-30

    申请号：EP98967143.3

    申请日：1998-11-24

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： HILDENBRAND, Peter ,  LANG, Reinhard ,  LUDWIG, Alfons ,  PIPPER, Gunter

    IPC分类号： C08G69/46 ,  C08G69/16

    CPC分类号： C08G69/16 ,  C08G69/46

    摘要： A process is disclosed for continuously extracting polyamide particles from a circulating extraction solution in a vertical extraction column subdivided into two zones. The polyamide is treated in the first zone with an aqueous ε-caprolactam solution with 15-40 wt. % ε-caprolactam as extraction agent at 100 to 140 °C, and water is then used in the second zone as extraction agent at a temperature 5-40 °C lower. The process allows polyamides with a low monomer and oligomer content to be economically extracted.

    摘要翻译： 公开了一种用于在细分为两个区域的垂直萃取塔中从循环萃取溶液中连续萃取聚酰胺颗粒的方法。 聚酰胺在第一区中用含15-40wt。％的ε-己内酰胺溶液处理。 ％ε-己内酰胺作为萃取剂在100至140℃下进行，然后在第二区域中使用水作为萃取剂，温度低于5-40℃。 该方法允许经济地提取具有低单体和低聚物含量的聚酰胺。

    VERFAHREN ZUM KONTINUIERLICHEN HERSTELLEN VON NIEDERMOLEKULAREN POLYAMIDEN
    2.
    发明公开
    VERFAHREN ZUM KONTINUIERLICHEN HERSTELLEN VON NIEDERMOLEKULAREN POLYAMIDEN 失效
    方法低分子聚酰胺连续生产

    公开(公告)号：EP0706538A1

    公开(公告)日：1996-04-17

    申请号：EP94920959.0

    申请日：1994-06-20

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： PIPPER, Gunter ,  KLEINKE, Andreas ,  HILDENBRAND, Peter

    IPC分类号： C08G69 ,  B01J19

    CPC分类号： C08G69/16 ,  C08G69/04

    摘要： A process is disclosed for continously preparing polyamides from a mixture of at least one lactam and water, as well as if required other monomer units and/or usual additives and fillers in polyamide-forming conditions. The mixture of initial substances is heated in the liquid phase in a first reaction zone until a conversion rate of at least 70 % is reached, then is adiabatically expanded and further polymerised in another reaction zone. In the first reaction zone, 0.5 to 7 % by weight water are added to the mixture, the mixture is heated up to a temperature range from 220 to 310 °C and polymerised until a conversion rate of at least 85 % isreached. In the second reaction zone, after the mixture is expanded, it is further polymerised at temperatures in a range from 215 to 300 °C without further heating.

    VERFAHREN ZUR KONTINUIERLICHEN EXTRAKTION VON POLYAMID
    4.
    发明授权
    VERFAHREN ZUR KONTINUIERLICHEN EXTRAKTION VON POLYAMID 有权

    公开(公告)号：EP1030872B1

    公开(公告)日：2002-02-06

    申请号：EP98967143.3

    申请日：1998-11-24

    申请人： BASF AKTIENGESELLSCHAFT

    发明人： HILDENBRAND, Peter ,  LANG, Reinhard ,  LUDWIG, Alfons ,  PIPPER, Gunter

    IPC分类号： C08G69/46 ,  C08G69/16

    CPC分类号： C08G69/16 ,  C08G69/46

    摘要： A process is disclosed for continuously extracting polyamide particles from a circulating extraction solution in a vertical extraction column subdivided into two zones. The polyamide is treated in the first zone with an aqueous epsilon -caprolactam solution with 15-40 wt. % epsilon -caprolactam as extraction agent at 100 to 140 DEG C, and water is then used in the second zone as extraction agent at a temperature 5-40 DEG C lower. The process allows polyamides with a low monomer and oligomer content to be economically extracted.

    摘要翻译： 公开了一种用于在细分为两个区域的垂直萃取塔中从循环萃取溶液中连续萃取聚酰胺颗粒的方法。 聚酰胺在第一区用含有15-40wt。％的ε-己内酰胺溶液处理。 ％ε-己内酰胺作为萃取剂，在100-140℃下，然后在第二区作为萃取剂，在5-40℃的温度下使用水。 该方法允许经济地提取具有低单体和低聚物含量的聚酰胺。