| abstract |
The invention relates to a new process for the preparation of a precipitated silica, in which: - a silicate is reacted with an acidifying agent, so as to obtain a suspension of precipitated silica, - said precipitated silica suspension is filtered in such a way that to obtain a filter cake, - said filter cake is subjected to a disintegration operation comprising the addition of a compound of aluminum, - after the disintegration operation, a drying step is carried out, characterized in that what is added to the filter cake, during or after the disintegration operation, a mixture of polycarboxylic acids. It is also related to new precipitated silicas and their uses. |