PROCESS FOR PREPARING PRECIPITATED SILICA COMPRISING HIGH COMPACTION STEP Russian patent published in 2017 - IPC C01B33/193 

FIELD: technological processes.

SUBSTANCE: present invention relates to a method of producing precipitated silica. Method comprises reacting silicate with an acidifying agent to obtain a precipitated silica suspension, followed by a separating step to obtain a cake and a step of drying said cake. Step of compacting said cake at a pressure greater than 10 bar but less than 45 bar is carried out between separating step and drying step.

EFFECT: invention provides cost-efficiency of process and higher output.

11 cl, 2 ex