Green transformation of white carbon black production process: from high pollution to zero emissions

Against the backdrop of increasing global environmental awareness, the white carbon black industry is facing unprecedented environmental pressures. The traditional production process of white carbon black generates a large amount of wastewater, exhaust gas, and solid waste, which has a serious impact on the environment. However, with the advancement of technology and policy guidance, the production process of white carbon black is undergoing a green transformation, moving from high pollution to zero emissions.


Environmental challenges of traditional craftsmanship


The traditional production process of white carbon black mainly adopts the sol process or gel process with sulfuric acid or hydrochloric acid as the precipitator. These processes generate a large amount of wastewater containing sodium salts during the production process, and approximately 35 to 40 cubic meters of wastewater are discharged for every ton of white carbon black produced. If these wastewater are discharged directly without treatment, they will cause serious pollution to water bodies and soil. In addition, traditional processes also generate a certain amount of exhaust gas and solid waste, further exacerbating environmental pressure.


Innovative application of zero emission technology


In order to address environmental challenges, research institutions such as Nanyang Oriental Institute of Applied Chemical Technology have successfully developed a new process for producing white carbon black using rice husk ash as a silicon source through carbon dioxide acid precipitation. This process is carried out under medium temperature and atmospheric pressure conditions to produce water glass with a modulus of 3.2, which is then precipitated with carbon dioxide gas to produce sodium carbonate and white carbon black. The recovery of sodium hydroxide or sodium carbonate through mother liquor treatment has achieved zero discharge of process wastewater in the production process. This innovative process not only eliminates the impact of sewage discharge on the environment, but also reduces production costs and improves resource utilization efficiency.


Policy guidance and industrial upgrading


The guidance and support of government policies are key factors in promoting the green transformation of white carbon black production processes. In recent years, the government has introduced a series of policy measures to encourage industrial upgrading and optimize structure, providing tax incentives and financial subsidies to enterprises that adopt green production processes. At the same time, the strictness of environmental supervision has also prompted enterprises to increase environmental investment and improve the environmental performance of production processes. Driven by both policy guidance and market demand, the white carbon black industry is gradually developing towards a green, low-carbon, and circular direction.