Patent ID: 7736611

Claim:
A method of preparing agglomerates of precipitated silica comprising the following steps: preparing a solution of at least two metal salts (Me), wherein the metal ions are divalent or polyvalent; preparing a solution of alkali metal (M) silicate having a molar ratio SiO 2 /M 2 O of 1-4; mixing said solutions and stirring the mixture whereby a coagulum immediately forms; rinsing the coagulum in water; collecting the coagulum; impregnating the coagulum with impregnation chemicals selected from the group consisting of KMnO 4 , C 2 H 2 O 4 , C 6 H 8 O 7 , Na 2 S 2 O 3 , NaClO, KOH, NaOH, KI, NaI, K 2 CO 3 , Na 2 CO 3 , NaHCO 3 , and KHCO 3 ; processing the coagulum to provide a dry matter content of >15; and shaping and drying the impregnated coagulum to a dry matter content of >75%.