As an important inorganic chemical material, the preparation technology of white carbon black directly affects the quality and application effect of the product. With the advancement of technology, the preparation method of white carbon black is constantly optimized, and the production efficiency and quality are steadily improving. This article will introduce several main preparation techniques for white carbon black and explore its future development trends.


1、 Gas-phase method


Gas phase method is one of the main methods for preparing high-purity and high-performance white carbon black. This method generates ultrafine silica particles through the gas-phase hydrolysis reaction of silicon compounds (such as silicon tetrachloride) at high temperatures. White carbon black prepared by gas-phase method has the advantages of small particle size, uniform distribution, and large specific surface area, and is widely used in high-end tires, electronic materials, and other fields. However, the high investment and energy consumption of gas-phase equipment limit its large-scale application.


2、 Precipitation method


Precipitation method is another commonly used method for preparing white carbon black. This method involves the neutralization reaction between sodium silicate and acids (such as sulfuric acid and hydrochloric acid) to produce silica precipitate, which is then washed, dried, and crushed to obtain white carbon black products. The precipitation method has a simple preparation process, low cost, and is suitable for large-scale production. However, the purity of the product is relatively low and the particle size distribution is wide, requiring subsequent modification to improve performance.


3、 Sol gel method


Sol gel process is a new technology for preparing silica. In this method, silica sol is formed by hydrolysis and polycondensation of silanol salt, and then white carbon black is obtained through gel, drying, calcination and other steps. Sol gel method can accurately control the particle size and morphology of white carbon black, and prepare products with special structure and performance, such as nano and porous white carbon black, which provides the possibility for high-end applications.


4、 Development Trends


With the increasing awareness of environmental protection and technological progress, the preparation technology of white carbon black is developing towards green, efficient, and intelligent directions. On the one hand, developing low-energy and low pollution preparation processes has become a research hotspot; On the other hand, by utilizing cutting-edge technologies such as nanotechnology and biotechnology, white carbon black products with special functions and properties can be prepared to meet the demands of the high-end market. At the same time, the construction of intelligent production lines will improve production efficiency and product quality stability, promoting the sustainable development of the white carbon black industry.