As an important industrial material, the preparation process of white carbon black not only reflects the power of technology, but also is closely related to environmental protection concepts. At present, the common methods for preparing white carbon black mainly include gas-phase method and precipitation method.


The gas-phase method uses silicon tetrachloride to hydrolyze at high temperatures in a hydrogen oxygen flame to prepare white carbon black. At high temperatures, silicon tetrachloride reacts violently with hydrogen and oxygen to produce nano-sized silica particles. The white carbon black prepared by this method has high purity, small particle size and uniform distribution, excellent reinforcement performance, and is widely used in high-end rubber products, electronic packaging materials and other fields. However, the gas-phase method also faces some challenges, such as high raw material costs and high energy consumption in the production process. In order to reduce costs and energy consumption, researchers are constantly exploring new process parameters and catalyst systems to improve reaction efficiency and raw material utilization.


The precipitation method involves the reaction of sodium silicate with acid to form a precipitate, which is then washed and dried to obtain white carbon black. This method has a wide range of raw material sources, low costs, and is suitable for large-scale production. Precipitation method white carbon black has a wide range of applications in industries such as tires and coatings. However, the purity and performance of precipitation method products are slightly inferior to those of gas-phase method. In order to improve product quality, researchers are committed to optimizing reaction conditions, such as controlling reaction temperature, pH, stirring speed, etc., to obtain finer particle size and better dispersion of white carbon black.


Both gas-phase and precipitation methods face environmental issues during the preparation process. If the waste gas, wastewater, and waste residue generated during the production process are not properly treated, they can cause pollution to the environment. Therefore, modern white carbon black preparation processes are increasingly emphasizing the application of environmentally friendly technologies. For example, advanced waste gas treatment equipment is used to recycle the hydrogen chloride gas generated by the reaction, wastewater is deeply treated to achieve recycling, and waste residue is comprehensively utilized to develop new products. Through the integration of technology and environmental protection, the preparation process of white carbon black is developing towards a green and sustainable direction.