precipitated silica
The precipitation method is to react water glass with sulfuric acid or hydrochloric acid to generate silicic acid, which is then decomposed to produce white carbon black. SiO2 content is around 90%, with high market demand, mainly used as rubber reinforcement filler. Our country's white carbon black production plants mainly use this method to produce white carbon black. The production technology and equipment of precipitation method white carbon black are simple, the product activity is not high, the particles are difficult to control, the affinity is poor, the reinforcement performance is low, and the hydrophilic group bonding on the particle surface is severe, which weakens the binding force of the product.
