I. Core recovery technology
Physical purification method
Filtration/centrifugal separation: remove mechanical impurities (dust, metal chips) and large particle pollutants in silicone oil, suitable for low-pollution waste oil.
Distillation and devolatilization: heating in a vacuum environment to separate volatile solvents and water, retaining the effective components of fluorosilicone oil, the temperature must be controlled below 200°C to prevent decomposition.
Chemical regeneration method
Adsorption purification: use activated white clay or molecular sieves to adsorb pigments and acidic substances to restore the transparency of oil products.
Acid-base neutralization: for waste oil containing acidic/alkaline pollutants, add reagents to neutralize residual ions and reduce corrosiveness.
Special recovery of fluorine element
Fluorine-containing waste gas is absorbed by alkaline solution to generate fluoride salts (such as NaF) to achieve fluorine resource recovery (refer to the technical logic of phosphorus chemical tail gas treatment).

‌II. Recycling Path‌
‌Application Field‌ ‌Technical Points‌ ‌Quality Requirements‌
‌Industrial Lubricants‌ After regeneration, the viscosity needs to be stable within the range of ±10%, and antioxidants are added to extend the service life. Viscosity ≥500mPa·s, non-corrosive
‌Release agent substrate‌ Remove impurities to a content of <0.01%, ensure compatibility with molds (such as AFS-R-2121B type is suitable for high-temperature molds) Purity>99.5%, no sediment
‌Functional additives‌ Compounded with other compounds (such as defoamers need to maintain surface tension ≤24mN/m) Chemical stability passes 48h test

III. Technical bottlenecks and countermeasures‌
‌Impurity complexity‌
‌Difficulty‌: Fluorosilicone oil is easy to adsorb polar solvents (such as ketones) and heavy metal ions, and the traditional separation efficiency is low.
‌Countermeasures‌: Combined membrane separation + ion exchange resin, directional removal of trace pollutants.
‌Performance attenuation control‌
‌Difficulty‌: The recycling process may cause the trifluoropropyl side chain to break, reducing temperature resistance.
‌Countermeasures‌: Low-temperature short-time treatment under inert gas protection (<180℃/<30min).

IV. Industry practice trends‌ ‌Closed circulation system‌ (such as Zhenjiang project): integrated collection-purification-regeneration process, reducing transportation pollution and energy consumption by 40%.
‌Intelligent monitoring‌: Real-time detection of viscosity, flash point and other parameters, dynamic adjustment of process (refer to the direction of technology upgrade of Shandong enterprises).
‌Resource extension‌: Fluorine recovery products are used for fluorine chemical synthesis (global TOP20 enterprises accelerate layout).