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    Magnetic carbon black, process for preparing the same, and method of modifying magnetic carbon black
    2.
    发明公开
    Magnetic carbon black, process for preparing the same, and method of modifying magnetic carbon black 失效
    Magnetischer Russ，Verfahren zu seiner Herstellung und Modifizierung von magnetischem Russ。

    公开(公告)号：EP0278743A1

    公开(公告)日：1988-08-17

    申请号：EP88301105.8

    申请日：1988-02-10

    申请人： TOKAI CARBON CO. LTD.

    发明人： Nakada, Toshio ,  Takemura, Fumio ,  Sema, Yoshihito ,  Kataoka, Kazuhito

    IPC分类号： C09C1/56

    CPC分类号： H01F1/06 ,  C01P2004/04 ,  C01P2004/64 ,  C01P2006/42 ,  C09C1/50 ,  C09C1/56

    摘要： Magnetic carbon black, a process for preparing the same, and a method of modifying magnetic carbon black are provided. The magnetic carbon black is prepared by process A in which when a hydrocarbon is supplied into a high temperature combustion gas stream formed by combustion of a fuel to prepare carbon black, an organic transition metal compound is supplied together with the hydrocarbon and, at the same time, an oxygen gas is supplied from the circumference of the hydrocarbon, process B in which a transition metal compound is supplied together with a hydrogen gas on the downstream side of the supply position of the hydrocarbon, and process C in which a hydrocarbon is supplied into a high temperature combustion gas stream on both the upstream side and the downstream side and a transition metal compound is supplied from a position between the supply positions of the hydrocarbon. The average particle diameter of the magnetic fine particle and the average particle diameter of carbon black in the magnetic carbon black prepared by process A are 30 nm or more and 20 nm or less, respectively. The magnetic characteristics of the magnetic carbon black can be enhanced by heating the magnetic carbon black in a non-oxidizing atmosphere at 400 to 900° C.

    摘要翻译： 提供了磁性炭黑，其制备方法和改性磁性炭黑的方法。 通过方法A制备磁性炭黑，其中当将烃供应到由燃料燃烧形成的高温燃烧气体流中以制备炭黑时，将有机过渡金属化合物与烃一起供入， 时间，从碳氢化合物的周围供给氧气，在碳氢化合物的供给位置的下游侧将与过程金属化合物一起供给过程金属化合物的方法B和其中供给烃的方法C一起供给氧气 进入上游侧和下游侧的高温燃烧气体流中，并且从烃的供给位置之间的位置供给过渡金属化合物。 通过方法A制备的磁性炭黑中的磁性微粒的平均粒径和炭黑的平均粒径分别为30nm以上且20nm以下。 通过在400-900℃的非氧化性气氛中加热磁性炭黑可以提高磁性炭黑的磁特性。