Organophilic clay and process for preparing it
    239.
    发明公开
    Organophilic clay and process for preparing it 失效
    有机粘土及其制备方法

    公开(公告)号:EP0426255A3

    公开(公告)日:1991-12-11

    申请号:EP90202875.2

    申请日:1990-10-30

    Abstract: A process for producing an organophilic clay comprises:
    (a) milling and refining a raw clay selected from the group of smectite clays in order to obtain a milled and refined clay; (b) replacing the exchangeable cations of the refined clay with sodium or ammonium cations, by means of a cation-exchange treatment; (c) contacting the cation-exchanged clay with a sulfonated condensed-ring polycyclic aromatic compound in order to obtain an organophilic clay; and (d) recovering the organophilic clay from the products obtained from the preceding (c) step. The so obtained organophilic clay is particularly useful as a thixotropic agent in organic vehicles, in particular in oil-base drilling muds.

    Abstract translation: 用于生产亲有机粘土的方法包括:(a)研磨和精炼选自蒙脱石粘土的生粘土,以获得研磨和精制粘土; (b)通过阳离子交换处理用钠或铵阳离子代替精制粘土的可交换阳离子; (c)使阳离子交换的粘土与磺化稠环多环芳族化合物接触以获得亲有机质的粘土; 和(d)从前面(c)步骤获得的产物回收亲有机粘土。 如此获得的亲有机粘土特别可用作有机载体中的触变剂,特别是在油基钻井泥浆中。

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