| 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, - after the disintegration operation, a drying step is carried out, characterized in that it is added to the filter cake, during or after the disintegration operation, at least one polycarboxylic acid. It is also related to new precipitated silicas and their uses. |