Patent ID: 8454919

Claim:
A process for the production of a precipitated silica including a step for filtering and washing an aqueous suspension (S), comprising: (a) filtering a first portion (S 1 ) of a precipitated silica suspension (S) to form a cake (G 1 ) and said cake (G 1 ) is then washed and a suspension (S′ 1 ) is formed by suspending the obtained washed cake (G 1 ), optionally by dilution with water; (b) filtering a second portion (S 2 ) of the suspension (S), whereby a cake (G 2 ) is obtained; and (c) filtering said suspension (S′ 1 ) emanating from step (a) through the cake (G 2 ) obtained at the end of step (b), the cake (G 2 ) being a filtration precoating layer.