NOUVEAU PROCEDE DE PREPARATION DE SILICES PRECIPITEES, NOUVELLES SILICES PRECIPITEES ET LEURS UTILISATIONS, NOTAMMENT POUR LE RENFORCEMENT DE POLYMERES
    21.
    发明公开
    NOUVEAU PROCEDE DE PREPARATION DE SILICES PRECIPITEES, NOUVELLES SILICES PRECIPITEES ET LEURS UTILISATIONS, NOTAMMENT POUR LE RENFORCEMENT DE POLYMERES 审中-公开
    NOUVEAU PROCEDE DE PREPARATION DE SILICE PRECIPITEES,NOUVELLES SILICES PRECIPITEES ET LEURS UTILISATIONS,NOTAMMENT POUR LE RENFORCEMENT DE POLYMERES

    公开(公告)号:EP2890639A1

    公开(公告)日:2015-07-08

    申请号:EP13759478.4

    申请日:2013-09-02

    Abstract: The invention concerns a novel method for preparing a precipitated silica, wherein: a silicate is reacted with an acidifying agent so as to obtain a precipitated silica suspension; the precipitated silica suspension is filtered in order to obtain a filter cake; the filter cake is subjected to a disintegration operation involving the addition of an aluminium compound; following the disintegration operation, a drying step is carried out. The invention is characterized in that a polycarboxylic acid selected from among dicarboxylic and tricarboxylic acids is added to the filter cake after the addition of the aluminium compound. The invention also concerns novel precipitated silicas and their uses.

    Abstract translation: 本发明涉及一种制备沉淀二氧化硅的新方法,其中:使硅酸盐与酸化剂反应以获得沉淀二氧化硅悬浮液; 过滤沉淀的二氧化硅悬浮液以获得滤饼; 将滤饼进行涉及添加铝化合物的分解操作; 在分解操作之后,进行干燥步骤。 本发明的特征在于,在加入铝化合物之后,将选自二羧酸和三羧酸的多元羧酸加入到滤饼中。 本发明还涉及新型沉淀二氧化硅及其用途。

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