专利名称：NOVEL METHOD FOR PREPARING
PRECIPITATED SILICAS
发明人：BOIVIN, Cédric,GUY, Laurent,PERIN,
Eric,LAMIRI, Kilani
申请号：EP13759478.4申请日：20130902公开号：EP2890639B1公开日：20190717
摘要：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 silicasuspension; 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 analuminium compound; following the disintegration operation, a drying step is carried out.The invention is characterized in that a polycarboxylic acid selected from amongdicarboxylic and tricarboxylic acids is added to the filter cake after the addition of thealuminium compound. The invention also concerns novel precipitated silicas and theiruses.
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