| abstract |
The invention relates to a novel process for the preparation of a precipitated silica, in which:n a silicate is reacted with an acidifying agent, so as to obtain a suspension of precipitated silica, said suspension of precipitated silica is filtered, so as to obtain a filtration cake, said filtration cake is subjected to a liquefaction operation comprising the addition of an aluminum compound, after the liquefaction operation, a drying stage is carried out,n ncharacterized in that a mixture of polycarboxylic acids is added to the filtration cake, during or after the liquefaction operation.n nn It also relates to novel precipitated silicas and to their uses. |