The preparation process of white carbon black is a perfect combination of chemical engineering and materials science. The process is complex and precise, and each step is related to the quality and application performance of the final product. At present, the preparation of white carbon black is mainly divided into two categories: precipitation method and gas-phase method.


Precipitation method: Using sodium silicate (water glass) and inorganic acids (such as sulfuric acid) as raw materials, under controlled temperature and pH conditions, a chemical reaction is carried out to generate silica precipitate, which is then washed, dried, and crushed to obtain white carbon black. This method has low cost and is suitable for large-scale production, but the product purity is relatively low, making it suitable for fields that do not require high performance.


Gas phase method: Using silicon tetrachloride (SiCl ₄) as raw material, it reacts with hydrogen gas (H ₂) and oxygen gas (O ₂) at high temperature to generate gas-phase silica, which is then collected and purified to obtain high-purity white carbon black. Gas phase products have the characteristics of small particle size, large specific surface area, and high purity, and are widely used in high-end fields such as high-performance tires and electronic packaging materials, but the production cost is relatively high.


Whether it is precipitation method or gas-phase method, the preparation of white carbon black is a magnificent transformation from raw materials to high-quality products. Each step embodies the wisdom and sweat of scientific and technological personnel, constantly promoting the development of the white carbon black industry towards higher quality and efficiency.
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