A new method for the preparation of precipitated silica, a new precipitated silica and its application, especially for the reinforcement of polymers

摘要

The invention relates to a new method for preparing precipitated silica, wherein: the silicate reacts with an acidifier to obtain a precipitated silica suspension; the precipitated silica suspension is filtered to obtain a filter cake; and the silicate suspension is submitted to the acidifier. Filtering in demoulding operation and drying step after demoulding operation are characterized in that filtering cake is added during or after demoulding operation.At least one polycarboxylic acid The invention also relates to a new precipitated silica and its application.