I. Main Application Processes and Used Solvents
The solvent recovery machine is mainly used to handle waste solvents generated in the following production processes:
PCB (Printed Circuit Board) Manufacturing:
Development/Stripping Process: Use solvents such as carbonates (e.g., PC, PMC) and glycol ethers to remove the photoresist.
Cleaning process: Before lamination or after electroplating, the board surface is cleaned with ethanol, isopropyl alcohol (IPA), acetone, etc.
Ink cleaning: Use ethyl acetate, acetone, methyl ethyl ketone (MEK), etc. to clean the screen and equipment.
Semiconductor and Chip Manufacturing:
Wafer cleaning: Before and after processes such as lithography, etching, and deposition, precise cleaning and drying are carried out using ultra-pure isopropyl alcohol (IPA), acetone, N-methylpyrrolidone (NMP), etc.
Photoresist removal: Use DMSO (dimethyl sulfoxide), amine solvents, etc. to strip the photoresist.
Liquid Crystal Display (LCD/OLED) manufacturing:
Panel cleaning: Use IPA, acetone, etc.
Orientation film coating/cleaning: Use specific solvents such as methyl ethyl ketone (MEK) and butyl acetate.
Lithography process: Similar to semiconductors, relevant solvents are used.
Electronic Components and Assembly:
Post-SMT (Surface Mount Technology) cleaning: Use IPA (Isopropyl Alcohol) and hydrocarbon cleaners to remove flux residues.
Precision parts cleaning: Use trichloroethylene, dichloromethane (traditional, being replaced by environmentally friendly alternatives) or modified alcohols, HFC/HFE fluorinated solvents.
Lithium battery manufacturing:
Electrode coating: N-methylpyrrolidone (NMP) is used as the solvent for the cathode slurry in large quantities, and it has a very high recycling value.
II. Core Value and Advantages Brought by Solvent Recovery Machines
Significant Direct Economic Benefits:
Reduce raw material costs: High-purity electronic-grade solvents are expensive (such as ultra-pure IPA and NMP). The recycling machine can purify waste solvents to a reusable standard, with a recovery rate typically exceeding 90%, significantly reducing the purchase of new solvents.
In the lithium battery industry, NMP recovery systems are almost standard equipment on production lines. They can recycle the expensive NMP, which is a key factor in reducing costs.
Meet environmental protection and regulatory requirements:
Reduce hazardous waste discharge and treatment costs: Waste solvents are classified as hazardous waste (HW06), with extremely high treatment costs (thousands of yuan per ton). On-site recycling significantly reduces the amount from the source, directly saving hazardous waste disposal, transportation and storage costs.
Compliance with regulations: Strictly abide by laws such as the "Cleaner Production Promotion Law" and the "Atmospheric Pollution Prevention and Control Law", reduce the emission of VOCs (volatile organic compounds), and avoid environmental protection penalties.
Ensuring production safety and stability:
Reducing inventory and risks: On-site recycling reduces the large amount of new and waste solvents stored in the factory, lowering the safety hazards such as fire and leakage.
Stabilize the supply chain: Reduce absolute reliance on external solvent suppliers to ensure partial self-sufficiency even when market supply is tight or prices fluctuate.
Enhancing Corporate Social Responsibility (CSR) and Image:
Realizing a circular economy and green manufacturing is a concrete practice in response to the national strategies of "carbon neutrality" and "green development". It helps enhance the corporate image and gain recognition from customers, especially high-end international ones.
