Analysis of White Carbon Black Production Process: Comparison between Precipitation Method and Gas Phase Method

The production process of white carbon black is mainly divided into two types: precipitation method and gas-phase method. The precipitation method is currently the most commonly used method in industrial production. Its principle is to react soluble silicates with acids to precipitate silica in solution, and then obtain white carbon black through subsequent processing. The precipitation method has a simple process, inexpensive and readily available raw materials, low production costs, but relatively low product purity, making it suitable for fields with low performance requirements. The gas-phase method uses silane halides as raw materials to directly generate nanoscale white carbon black under conditions such as high temperature and hydrogen oxygen flame. The white carbon black produced by gas-phase method has high purity, large specific surface area, uniform particle size distribution, excellent performance, and is widely used in high-end rubber products, electronic materials, special coatings and other fields. However, the gas-phase production process is complex, requires high equipment and technology, and has relatively high raw material costs, which limits its application in some cost sensitive fields. With technological progress, new production processes such as sol gel process are also emerging, providing more possibilities for the production of silica.