Is the environmental pressure of producing fumed silica now high?

There is basically no environmental pressure on mature technology. The product waste gas of gas phase white carbon black is: chlorine gas, hydrogen chloride, other water, carbon dioxide, etc., chlorine gas can react with sodium hydroxide to form sodium hypochlorite, which has certain economic benefits. Hydrogen chloride can be absorbed by deionized water to form 31% hydrochloric acid, and then Hydrogen chloride gas is generated by high temperature analysis for use in silicone, trichlorosilane or other production. Finally, the trace amount of chlorine and hydrogen chloride in the exhaust gas is again emptied through the exhaust gas lye, and the harmful chlorine gas in the exhaust gas will reach the ppm level, which meets the discharge standard and has no environmental protection pressure; the wastewater is ordinary alkaline wastewater, which can be discharged to the outside after treatment. Local sewage treatment plant. If it is a device built several years ago, the current environmental protection pressure is very high, and even the production conditions are not met.