Process for the preparation of silica of the type that comprises the reaction of a silicate with an acidifying agent by means of which a silica suspension is obtained, and then the separation and drying of this suspension, characterized in that the reaction of silicate with the acidifying agent It is carried out according to the following successive stages: (i) an aqueous tank base is formed having a pH between 2 and 5, preferably between 2.5 and 5, (ii) they are added to said tank base, simultaneously , silicate and the acidifying agent, in such a way that the pH of the reaction medium is kept between 2 and 5, preferably between 2.5 and 5, (iii) the addition of the acidifying agent is stopped, but the addition of silicate is maintained to the reaction medium until a pH value of the reaction medium is obtained between 7 and 10, preferably between 7.5 and 9.5, (iv) silicate and the acidifying agent are simultaneously added to the reaction medium, such that the pH of the medium The reaction is maintained between 7 and 10, preferably between 7.5 and 9.5, (v) the addition of the silicate is stopped, but the addition of the acidifying agent to the reaction medium is maintained until a pH value of the medium is obtained reaction rate less than 6.Procedimiento de preparación de sílice del tipo que comprende la reacción de un silicato con un agente acidulante mediante lo que se obtiene una suspensión de sílice, y después la separación y el secado de esta suspensión, caracterizado por que la reacción de silicato con el agente acidulante se realiza de acuerdo con las siguientes etapas sucesivas: (i) se forma un pie de cuba acuoso que tiene un pH comprendido entre 2 y 5, preferentemente entre 2,5 y 5, (ii) se añaden a dicho pie de cuba, simultáneamente, silicato y el agente acidulante, de tal forma que el pH del medio de reacción se mantenga entre 2 y 5, preferentemente entre 2,5 y 5, (iii) se detiene la adición del agente acidulante, pero se mantiene la adición de silicato al
