Classification and production process correlation of precipitated white carbon black
As an important inorganic material, the classification of precipitated white carbon black depends not only on its own physical and chemical properties, but also closely related to the production process. The following are the classification and characteristics of precipitation method white carbon black based on production process:
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Classified by production raw materials
Sodium silicate precipitation method for white carbon black
Production process: Sodium silicate (water glass) and acidic substances (such as sulfuric acid, hydrochloric acid, etc.) are used as raw materials to produce precipitated white carbon black through acid-base neutralization reaction. During the reaction process, sodium silicate hydrolyzes under acidic conditions to form silicic acid, which further condenses to form precipitated white carbon black.

Characteristics: The precipitated white carbon black produced by this method has a wide particle size distribution, with more silanol groups on the surface and high surface activity. Due to its relatively simple production process and low cost, it is widely used in ordinary rubber and plastic products.

Silicon tetrachloride precipitation method for white carbon black
Production process: Using silicon tetrachloride as raw material, precipitation method white carbon black is generated in hydrolysis reaction. During the hydrolysis process, silicon tetrachloride releases hydrogen chloride gas, which needs to be treated with special equipment to prevent environmental pollution.

Characteristics: By controlling hydrolysis conditions such as temperature, pressure, and hydrolysis rate, precipitation method white carbon black with narrow particle size distribution and uniform surface properties can be prepared. The precipitated white carbon black produced by this method has high purity and good dispersibility, and is suitable for the field of high-performance materials, such as electronic packaging materials and high-performance rubber products.

Classified by special processes in the production process
Ordinary precipitation method white carbon black
Production process: Traditional acid-base neutralization reaction is used to prepare precipitated white carbon black through simple stirring and precipitation process. This method has a simple production process and low equipment requirements.

Features: The product has a wide particle size distribution, high surface activity, but poor dispersibility. Mainly used for ordinary rubber and plastic products with low performance requirements.


Ultra fine precipitation method for white carbon black
Production process: On the basis of traditional precipitation method, precipitation method white carbon black with smaller particle size and more uniform distribution is prepared by controlling reaction conditions (such as reaction temperature, acid-base concentration, etc.) and adopting special post-treatment processes (such as ultrasonic dispersion, high-speed shearing, etc.).

Characteristics: Ultra fine precipitation method white carbon black has a higher specific surface area and surface energy, which can better interact with the matrix material and improve the performance of the material. For example, using ultrafine precipitated white carbon black in high-performance rubber can significantly improve the tensile strength and wear resistance of the rubber. In electronic materials, ultrafine precipitation method of white carbon black can be used to prepare electronic packaging materials with high thermal conductivity and high insulation.


The classification of precipitated white carbon black is closely related to the production process, and different production processes determine the characteristics and application areas of the product. With the continuous advancement of technology, new production processes will continue to emerge, providing more possibilities for the performance improvement and application expansion of precipitated white carbon black.