Environmental protection in silicone production: from pollution control to green transformation
Hits: 466
img
1. Environmental protection regulations force: industry transformation under high policy pressure
In recent years, the Chinese government has adopted policies such as the "Action Plan for New Pollutant Control" and the "14th Five-Year Plan" New Materials Industry Development Plan, which clearly require silicone companies to reduce VOCs emissions by 40% within three years, and include semiconductor packaging thermal conductive gels and 3D printing materials in the "Guide Catalog for the First Batch of Application Demonstration of Key New Materials". Taking the Xinjiang Zhundong base as an example, through technological upgrades, the energy consumption per ton has been reduced by 23%, and the emission of waste gas and wastewater has decreased by 35% year-on-year, becoming a benchmark for the industry's green transformation. Shenzhen, Chengdu and other places have also introduced subsidy policies, giving a subsidy of 500 yuan per ton for battery packs using environmentally friendly materials, and promoting companies to actively eliminate backward production capacity.
2. Technological innovation drive: from end-of-pipe treatment to source pollution reduction
Clean production technology: Hesheng Silicon Industry has built the world's first "5G+Industrial Internet" silicone production base. Through digital transformation, the monomer synthesis reaction cycle has been shortened by 25%, the catalyst conversion efficiency has been increased to 99.2%, the by-product recovery rate has reached 98%, and the annual generation of hazardous waste has been reduced by 12,000 tons.
Waste gas deep treatment: Jiujiang Yongzhuo Silicone adopts a combined process of "water washing + alkali washing + activated carbon adsorption" to purify waste gases such as hydrogen chloride and methyl chloride in multiple stages. The emission concentration after treatment is 50% lower than the national standard, and the activated carbon regeneration rate reaches 80%.
Wastewater zero discharge practice: A company invested 230 million yuan to build a wastewater treatment system. Through the "iron chip fluidized bed reduction + Fenton oxidation + reverse osmosis membrane" process, it can achieve an annual recovery of 1.2 million tons of water resources, reduce COD emissions by 180 tons, and reduce treatment costs by 40% compared with traditional methods.
3. Circular economy model: breakthrough in resource utilization
Xin'an shares built a "chlor-alkali-organosilicon" industrial park, using chlorine in chlor-alkali production for organosilicon synthesis, and converting by-product hydrochloric acid into polysiloxane intermediates, with a resource utilization rate of 98.5%, saving 120 million yuan annually. Dongyue Group has made a breakthrough in the "ion membrane electrolysis" process, reducing the comprehensive energy consumption of chlor-alkali to 2.8 tons of standard coal per ton of alkali, 15% lower than the industry average. Bio-based organosilicon has become a new track, with a production capacity of 50,000 tons in 2025 and an annual growth rate of more than 35%. Its raw materials come from renewable resources such as corn stalks, and its carbon footprint is 60% less than that of traditional products.
4. Industry ecological reconstruction: green competitiveness becomes a core barrier
Heading companies strengthen their environmental protection advantages through the integration of the entire industrial chain. For example, Hesheng Silicon Industry has achieved a vertical layout from industrial silicon to organosilicon monomers, reducing pollution in the intermediate links; Dongyue Silicon Materials has developed a silicon-based aerogel with a thermal conductivity of 0.012W/(m·K), breaking the foreign technology monopoly. By 2025, the industry's investment in environmental protection transformation will reach 12 billion yuan. Small and medium-sized enterprises will accelerate their exit due to cost pressure. The production capacity share of CR5 enterprises will increase to 70%. The Yangtze River Delta region will contribute 47% of the national market share, forming a positive cycle of "technology-environmental protection-market".