Research on green production technologies for precipitated silica is rapidly developing towards high efficiency, low consumption, and environmental protection.  Through innovative processes and resource recycling, it effectively addresses the high energy consumption and pollution problems in traditional production processes, providing technical support for the sustainable development of the precipitated silica industry.
I. Limitations of Traditional Production Processes
Traditional precipitated silica production processes mainly have the following problems:
Coal gas combustion method: The reaction of pyrolytic carbon black obtained by burning carbon sources such as methane or ethylene with silicates produces a large amount of dust and sulfur dioxide, causing environmental pollution.
Polydimethylsiloxane sublimation method: Requires sophisticated equipment, resulting in high production costs and high energy consumption.
High energy consumption: Traditional processes involve high-temperature pyrolysis reactions, consuming a large amount of energy and resulting in low energy utilization efficiency.
Environmental pollution: The production process generates a large amount of harmful gases such as carbon dioxide and sulfur dioxide, putting pressure on the atmospheric environment.

II. Main Green Production Technologies
1. Aqueous Synthesis Technology
Core principle: Using water as a solvent for synthesis, through aqueous phase resin reaction synthesis, using water-soluble dithiourea as a reactant and carrier, the reaction is carried out in the aqueous phase.
Technical advantages:
No organic solvents: No organic solvents are used, reducing environmental pollution.
Low-temperature reaction: The reaction is carried out at a lower temperature, significantly reducing energy consumption.
High-purity product: High-purity, uniformly dispersed precipitated silica products can be prepared.
Simple process: Simple production equipment and easy operation improve production efficiency.
Application prospects: Applicable to high-performance rubber materials, solar cells, and other fields, improving product performance.
2. Carbon Dioxide Conversion Technology
Core principle: Converting carbon dioxide into high-purity carbon products. Through specific catalysts and high-temperature and high-pressure conditions, carbon dioxide is decomposed, crystallized, and forms pure precipitated silica.
Technical advantages:
Resource utilization: Recycling waste carbon dioxide resources, achieving resource recycling.
Environmentally friendly and sustainable: The process has no carbon dioxide emissions, reducing greenhouse gas emissions.
Multi-field applications: The resulting carbon products can be applied in clean energy, chemical industry, and materials science fields.
Application prospects: Has broad application potential in solar cells, fuel cells, conductive polymer materials, and other fields.
3. Plasma Method
Core Principle: Utilizing high-energy plasma to process deposits in the gas phase into precipitated silica. Plasma is a highly excited gaseous substance composed of charged and neutral particles.
Technological Advantages:
Low energy consumption: No high-temperature combustion is required, only certain excitation conditions, significantly reducing energy consumption.
Fast reaction speed: The use of highly excited plasma greatly accelerates the reaction speed.
High product quality: The prepared precipitated silica is pure and free of impurities.
Low environmental pollution: No flames, no solvents, and no exhaust gas emissions.
Application Prospects: Widely used in polymers, rubber, electronic devices, coatings, inks, and other fields.
4. Precipitation Method Green Process
Core Principle: By adjusting reaction conditions, carbon-containing compounds in the raw materials undergo oxidation reactions under high temperature and catalyst action, forming carbon monoxide or carbon dioxide in the gas phase, and then carbon particles are captured through cooling and filtration.
Technological Advantages:
Wide range of raw materials: Petroleum chemicals, coal chemicals, and fruit peel waste can be used as raw materials.
Catalyst optimization: New catalysts such as precious metals, rare earth elements, and inorganic oxides reduce resource consumption.
Optimized reaction conditions: By controlling reaction temperature, time, and pressure, the yield is increased and particle size is controlled.
Application Prospects: Widely used in catalysts, electronic materials, coatings, rubber, and other fields.
5. Other Green Technologies
Microwave-assisted synthesis technology: Rapidly heats the reaction system, reducing reaction time and saving energy.
d4 treatment technology: Processes organic waste through microbial metabolic capabilities, converting waste into organic fertilizers or biofuels, achieving resource recycling.
Waste heat recovery technology: Recovers waste heat generated by the drying tower for heating and power generation, improving energy utilization efficiency.

III. Comprehensive Advantages of Green Production Technologies
1. Environmental Benefits
Reduced pollution emissions: Effectively reduces the emission of harmful gases such as sulfur dioxide and nitrogen oxides, reducing the impact on the atmospheric environment.
Resource recycling: Achieves resource utilization of waste, reducing the pressure on the exploitation of natural resources.
Reduced environmental risks: Reduces environmental risks in the production process and ensures the safety of the ecological environment.
2. Economic Benefits
Reduced production costs: Lower energy consumption and raw material costs, improved production efficiency
Improved product quality: The prepared precipitated silica products have high purity and uniform particle size, meeting the demand for high-quality materials.
Expanded application areas: Promoting the application of precipitated silica in high-tech fields and expanding market share.
3. Social Benefits
Promoting green transformation: Driving the precipitated silica industry towards a green and sustainable direction.
Enhancing industry image: Improving the environmental image of enterprises and enhancing market competitiveness.
Promoting policy implementation: Complying with national environmental protection policies and industrial policies, contributing to the achievement of the "dual carbon" goals.

IV. Future Development Trends
1. Technological Innovation Directions
Nanotechnology applications: Further optimizing the performance and application of precipitated silica through nanotechnology.
Artificial intelligence and big data: Utilizing AI and big data technology to optimize production processes and improve production efficiency.
Multi-technology integration: Combining multiple green technologies to form a more efficient production system.
2. Industrial Policy Support
National standards and regulations: The implementation of the "National Standard for Precipitated Silica" will further standardize green production.
Environmental policy guidance: The government promotes the application of green production technologies through environmental regulations and industrial policies.
Industrial collaborative innovation: Strengthening industry-university-research cooperation to promote the research and application of green production technologies.
3. Expansion of Application Fields
New energy field: Applications in solar cells, fuel cells, and other fields will be further expanded.
Pharmaceutical field: Precipitated silica has great potential for application in drug carriers, sustained-release systems, and medical materials.
Environmental protection field: As a highly efficient adsorbent, precipitated silica will be more widely used in wastewater treatment, air pollution control, and other fields.
The research and application of green production technology for precipitated silica not only solves the environmental problems in traditional production processes but also provides new impetus for the sustainable development of the precipitated silica industry. With continuous technological progress and sustained policy support, green production technology for precipitated silica will play an important role in more fields, contributing to the achievement of the "dual carbon" goals and the construction of a beautiful China.