Main application scenarios
Scenario One: Lithium Battery Manufacturing Industry (the largest application field)
Waste liquid to be recycled: NMP waste gas condensate generated in the electrode (positive and negative) coating process.
Characteristics of the waste liquid: NMP concentration is usually between 40% and 70%, containing PVDF binder, conductive agent particles, and metal ions (such as Li, Co, etc.) impurities.
Core challenges: NMP raw material cost is high, accounting for a major part of the production cost. The volume of waste liquid is large, and the cost of hazardous waste treatment is astonishing. The purity of the recycled NMP must be extremely high (>99.5%), and the moisture content must be extremely low (<500 ppm, advanced production lines require <200 ppm), otherwise it will seriously affect battery performance and safety.
Our solution: High vacuum low-temperature distillation technology is adopted to completely avoid NMP decomposition and coking. Special pretreatment and post-distillation systems effectively remove PVDF residues and moisture. The entire system is protected by nitrogen to meet the strict explosion-proof requirements of the coating workshop. The quality of the recycled NMP is stable and can be directly reused in high-end coating production lines.
Scenario Two: Semiconductor and Integrated Circuit (IC) Manufacturing
Waste liquid to be recycled: NMP solvents used in processes such as photoresist stripping and wafer cleaning.
Characteristics of the waste liquid: Complex composition, possibly containing photoresist residues, metal ions, particles, etc., with extremely strict purity requirements.
Core challenges: There is an almost "zero-tolerance" standard for the metal ion content and particle size of the recycled solvents. The production process has extremely high requirements for the stability and consistency of the solvents.
Our solution: The equipment body and pipelines are made of high-grade stainless steel (316L) or lined with enamel to prevent metal ion contamination. Precision filtration and ion exchange modules can be integrated to ensure ultra-clean products. Fully enclosed and automated operation to prevent external contamination.
Scenario Three: PCB (Printed Circuit Board) and Display Panels
Waste liquid to be recycled: Waste liquid from the PI cover film stripping and cleaning processes in the production of flexible circuit boards (FPC).
Characteristics of the waste liquid: May contain PI/PET film fragments, glue particles, and other impurities.
Core challenges: Ensure that the recycled solvent does not affect the quality of the precision circuits. Effectively filter solid impurities to prevent equipment blockage.
Our solution: Equipped with a multi-stage precision filtration system to effectively remove solid particles. The distillation process is gentle, ensuring that the recycled NMP is clear in color and does not affect the appearance and performance of subsequent products.
Scenario Four: Chemical and Pharmaceutical Industries
Waste liquid to be recycled: Waste NMP used as a reaction solvent, extractant, or cleaning agent.
Characteristics of the waste liquid: A wide variety of impurities, possibly containing high-boiling-point organic compounds, reaction by-products, etc.
Core challenges: The diversity of treated materials requires the equipment to have strong adaptability. The separation is difficult and requires efficient separation capabilities.
Our solution: Options of molecular distillation or high vacuum distillation can handle complex azeotropes and high-boiling-point impurities. Flexible process design allows adjustment of operating parameters according to different materials to achieve the recovery and purification of multiple solvents.
