Continuous extrusion process for wax production from HDPE using zeolite catalysts
A continuous extrusion process converts HDPE PCR into waxes using zeolite catalysts, offering efficient, low-temperature operation and high selectivity for hydrocarbon products. This scalable, solvent-free technology is ideal for adhesives, coatings, and other applications.
Overview
This innovative continuous extrusion process transforms high-density polyethylene (HDPE) post-consumer recyclate (PCR) into valuable waxes using hierarchical mesoporous zeolite catalysts. The technology operates at significantly lower temperatures (300–400°C) compared to traditional methods, enhancing energy efficiency and sustainability. It offers a scalable, solvent-free platform that produces tunable wax products with high throughput, making it suitable for applications in adhesives, coatings, and other non-food industries.
Technical specifications
Key features:
- Zeolite Catalysts: Utilizes mesoporous zeolite catalysts for enhanced access to active sites, enabling efficient breakdown of large polymer chains.
- Low-Temperature Operation: Operates at 300–400°C, reducing energy consumption compared to conventional catalytic cracking at 500°C or higher.
- High Selectivity: Achieves over 90% selectivity for C7–C14 hydrocarbons, with tunable product molecular weight.
- Scalable Production: Integrated into a continuous, solvent-free extrusion system compatible with existing infrastructure.
Process Benefits:
- Energy Efficiency: Lower operational temperatures improve sustainability.
- High Throughput: Continuous processing offers higher throughput and better process control than batch pyrolysis.
- Feedstock Tolerance: Strong tolerance for variations in HDPE feedstock quality.
Technology readiness level
This technology is currently at a Technology Readiness Level (TRL) of 5, indicating that it has been validated in a relevant environment. Extensive catalyst screening and successful extrusion trials support further development, with future plans for catalyst synthesis, extrusion optimization, and performance analysis to enhance product yield and selectivity.
About Case Western Reserve University
Case Western Reserve University is a comprehensive private research university anchored in Cleveland’s University Circle with a high‑intensity research enterprise. Its campus is co‑located with major hospital systems, giving industry partners access to clinical collaborators, regulatory know‑how, and real‑world validation environments. A large open‑access makerspace, shared core facilities, and an engineering co‑op program connect companies to rapid prototyping, testing, and talent pipelines. Research is supported by competitive federal funding from agencies such as NIH, NSF, DOE, and DoD. A dedicated technology transfer office, working with corporate engagement and entrepreneurship programs, supports IP strategy, licensing, sponsored research, and startup formation.
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