The particle size distribution of the white carbon black products produced by the precipitation method is uneven, and the quality of the products with lower purity is not uniform. The advantages are early start, mature technology, simple preparation process and low cost. Preparation method of precipitated white carbon: carbonization method, acidification method, non-metallic ore method, cellulose method, by-product recovery method, sol method, emulsion method and the like. Among them, the traditional preparation of precipitated silica is made by neutralizing silicate and inorganic acid to generate hydrated silica, and then filtering and crushing according to the requirements of the finished product, such as carbonization and acidification.

The white carbon black produced by the acidification method is the most traditional preparation method, which is a method of preparing white carbon black by reacting a soluble silicate with an acid to remove sodium sulfate and water. The reaction equation is: Na2O · SiO2 + nH2O + 2H + → SiO2 · nH2O + 2Na + + H2O. The technology for the preparation of white carbon black by acidification is relatively mature. At present, the key to this technical breakthrough is how to prepare white carbon black with excellent performance like the gas phase method.