The preparation of white carbon black is a complex process involving chemical reactions, physical separation, and fine processing, and its technological level directly affects the quality and performance of the product. At present, the main preparation methods of white carbon black include gas phase method, precipitation method and sol gel method, and each method has its unique advantages and scope of application.




Qi phase method: a symbol of high-end quality
The gas-phase method produces white carbon black through the gas-phase hydrolysis reaction of silicon compounds (such as silicon tetrachloride) at high temperatures. The product has high purity, small particle size, and large specific surface area, and is widely used in high-end rubber, plastic, and electronic materials fields. However, this method has high energy consumption and cost, which limits its large-scale application.


Precipitation method: an economically efficient preparation approach
The precipitation method uses sodium silicate to react with acid to form a precipitate, which is then washed, dried, and crushed to obtain white carbon black. This method is the mainstream method for producing white carbon black due to its easy availability of raw materials, simple process, and low cost. By optimizing reaction conditions and post-treatment processes, the performance of precipitated white carbon black can also reach a high level.


Sol gel method: exploration of innovative technology
The sol gel method forms a uniform sol system by controlling the hydrolysis and polycondensation of silicon source, and then obtains white carbon black through gel, drying and heat treatment. This method can accurately control the pore structure and surface properties of the product, providing the possibility for preparing white carbon black with specific functions, and is an important development direction for future white carbon black preparation technology.

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