METODO PARA GRANULAR FUSIONES DE POLIMERO QUE CONTIENEN FRACCIONES DE BAJA EBULLICION.

    公开(公告)号:MX2008011805A

    公开(公告)日:2008-09-29

    申请号:MX2008011805

    申请日:2007-03-21

    Applicant: BASF SE

    Abstract: La invención se relaciona con un proceso para granular fusiones de polímero, a presión superior a la ambiental, en una cámara de granulación hacia la que un aparato cortante se ha insertado en un primer paso, la cámara de granulación se inunda con un gas que es inerte hacia la fusión de polímero y cuya presión es aquella a la que se lleva a cabo el proceso de granulación. La fusión de polímero luego se inyecta hacia la cámara de granulación. Finalmente, el gas se desplaza de la cámara de granulación a través de un líquido tan pronto como la fusión de polímero empieza a fluir a través del aparato cortante, esta fusión siendo cortada en gránulos. (Figura 2).

    4.
    发明专利
    未知

    公开(公告)号:BRPI0709649A2

    公开(公告)日:2011-07-19

    申请号:BRPI0709649

    申请日:2007-03-21

    Applicant: BASF SE

    Abstract: The procedure for granulating polymer melts (21) in a granulation chamber (20) to manufacture polyamide, comprises flooding the granulating chamber with a nitrogen/air in relation to the polymer melt, injecting the polymer melt into the granulating chamber and expelling the nitrogen/air from the granulating chamber by a liquid once the polymer melt starts to flow through the cutting device. After expelling the nitrogen/air, a further polymer melt is injected into the chamber. In the granulation chamber, a cutting device is accommodated at a pressure above the ambient pressure. The procedure for granulating polymer melts (21) in a granulation chamber (20) to manufacture polyamide, comprises flooding the granulating chamber with a nitrogen/air in relation to the polymer melt, injecting the polymer melt into the granulating chamber and expelling the nitrogen/air from the granulating chamber by a liquid once the polymer melt starts to flow through the cutting device. After expelling the nitrogen/air, a further polymer melt is injected into the chamber. In the granulation chamber, a cutting device is accommodated at a pressure above the ambient pressure. The nitrogen/air shows a pressure, with which the granulation is carried out. The polymer melt in the cutting device is cut into pellets. The granulated pellets with the liquid are discharged from the granulation chamber and subsequently separated from the liquid. The pressure in the granulation chamber is 2-15 bar. An independent claim is included for a device for granulating polymer melts in the granulation chamber.

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