The invention discloses a preparation method of white
carbon black with a high structure and a high
oil absorption value. The preparation method comprises the following steps: preparing a
sodium silicate solution with the modulus of 3.3-3.5 and the concentration of 0.5-1.230 mol / L and
sulfuric acid with the
mass ratio concentration of 30-60%; the preparation method comprises the following steps: adding water and a
sodium silicate solution into a reaction kettle according to a volume ratio of 100: (30-50), adding
sodium dodecyl
benzene sulfonate, adding
sulfuric acid, reacting to form gel, stopping adding acid, and stirring; continuously adding acid to carry out
primary reaction, adjusting the pH value to 3.5-5.0, adding a 3-
glycidyl ether oxypropyl trimethoxy
silane coupling agent to age, stirring at a constant temperature, and dropwise adding
sodium silicate to enable the pH value of the suspension to reach 8.0-10.5; stirring while adding a
sodium silicate solution and
sulfuric acid to carry out secondary reaction, controlling the pH value to be 8.0-10.5, stopping adding
sodium silicate after 40-60 minutes, continuously adding sulfuric acid to completely react, uniformly stirring, adjusting the pH value to be 4.0-5.5, and continuously aging; adding a
coupling agent, and continuing aging to obtain a suspension; and carrying out washing,
solid-liquid separation, pulping and
spray drying to obtain a white
carbon black product with a high structure and a high
oil absorption value. The white
carbon black product prepared by the method has the characteristics of high structure and high
oil absorption value.