PurChemtech - Net Zero Waste Treatment Solution

Polarization Waste Film Recycling

Iodine&Boron removal/polymer film seperation/Compounding

Purchem has developed a comprehensive and innovative process for recycling polarization films, focusing on recovering valuable components and reducing environmental impact. The key steps in this recycling process include iodine and boron removal, PVA, PET, TAC and other films separation, then compounding.

1. Iodine and Boron Removal

Challenge: Polarization films often contain iodine and boron, which must be extracted to ensure environmental safety and enable material reuse.
Solution:
- Chemical Extraction: Proprietary reagents are used to selectively remove iodine and boron from the films without degrading the base materials.
- Advanced Purification: High-efficiency purification systems ensure that the extracted iodine and boron meet the standards for reuse or safe disposal.
Outcome: This step not only prevents hazardous waste accumulation but also allows for the recovery of iodine, a valuable industrial material.

2. Polymer Films Separation

Challenge: Polarization films are multi-layered composites typically made up of PVA (Polyvinyl Alcohol), PET (Polyethylene Terephthalate), and TAC (Triacetate Cellulose), which are difficult to separate without damaging the individual layers.
Solution:
- Mechanical Pre-Treatment: Initial shredding and size reduction prepare the films for processing.
- Selective Solvent Dissolution: Using specialized solvents, Purchem selectively dissolves PVA layers, allowing the separation of PET and TAC films.
- Filtration and Drying: Advanced filtration techniques recover the dissolved PVA, while PET and TAC layers are carefully cleaned and dried for reuse.
Outcome: Each material is preserved in high purity, ready for reintegration into new products.

3. Compounding

Challenge: Recovered materials must be refined and processed to meet stringent quality requirements for reuse in high-performance applications.
Solution:
- Material Refinement: Purchem employs compounding technology to blend recovered PVA, PET, and TAC with additives to enhance their properties.
- Custom Formulation: Depending on the end-use application, the materials are formulated to specific mechanical and optical standards.
- Re-Manufacturing: The compounded materials can be reused in producing new polarization films or other advanced products.
Outcome: High-quality recycled materials reduce dependency on virgin resources, contributing to cost savings and sustainability.

Technology Advantages

Sustainability: Significantly reduces landfill waste and promotes resource circularity.
Cost-Effectiveness: Recovered materials lower production costs for manufacturers.
High Purity: Maintains material integrity for reuse in demanding applications.
Environmental Compliance: Aligns with global environmental regulations and sustainability goals.

Purchem’s end-to-end solution transforms polarization film waste into valuable resources, addressing both industrial needs and environmental challenges.

Solvent Waste Recycling

Semiconductor grade solvent recycling processes

Purchem offers state-of-the-art solutions to recycle and reclaim solvents used in semiconductor manufacturing processes. These processes generate a significant volume of waste solvents, particularly from cleaning, etching, and lithography stages. Purchem’s recycling technology not only reduces environmental impact but also provides cost-effective reuse options for high-purity solvents.

Key Features of Purchem’s Solvent Recycling Technology

1. Multi-Stage Distillation for High Purity Recovery

Precision Purification: Advanced fractional distillation techniques isolate solvents with high precision, ensuring the separation of target solvents from contaminants.
Semiconductor-Grade Quality: The recovered solvents meet or exceed the stringent purity requirements for reuse in semiconductor processes.

2. Advanced Filtration and Chemical Treatment

Contaminant Removal: Proprietary filtration systems remove particulate matter, organic residues, and trace metals from the waste solvent stream.
Custom Chemical Processing: Tailored chemical treatments neutralize impurities that could compromise solvent performance.

3. Integration with Semiconductor Processes

Closed-Loop System: Recycled solvents are reintroduced directly into semiconductor fabrication processes, reducing the demand for virgin materials.
Process Compatibility: The technology supports the recycling of commonly used solvents such as IPA, acetone, NMP, and PGMEA.

Application in Semiconductor Manufacturing

Photoresist Removal:
- Recycles solvents used to strip photoresist, ensuring minimal residual contamination for subsequent lithography steps.
Wafer Cleaning:
- High-purity solvents recovered through Purchem’s technology maintain the rigorous cleanliness standards required for wafer preparation and processing.
Etching and Deposition Processes:
- Recycled solvents enable precise chemical reactions while reducing waste disposal volumes and costs.

Environmental and Economic Benefits

Waste Reduction: Minimizes hazardous solvent disposal, addressing stringent environmental regulations in semiconductor manufacturing.
Cost Savings: Significantly lowers raw material procurement costs by providing reusable high-purity solvents.
Sustainability: Reduces the carbon footprint of semiconductor production by conserving resources and enabling a circular material economy.

Company Info.

Address: 3F., No. 32, Ln. 417, Xingshan Rd., Neihu Dist., Taipei City 114516 , Taiwan (R.O.C.)
Email: infos@purchemtech.com.tw
Company ID: 83516144

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