Solvent-assisted thermo-catalytic conversion of HDPE-PCR to waxes

Overview

The proposed solution is a novel solvent-assisted thermo-catalytic process designed to convert high-density polyethylene (HDPE) post-consumer resin (PCR) into waxes and other valuable hydrocarbons. This method addresses the limitations of traditional catalytic processes that rely on precious metals by utilizing metal-halide catalysts, reducing both operational temperatures and reaction times. This approach not only promotes the sustainable recycling of plastic waste but also generates valuable by-products that can serve as solvent resources for further reactions.

Technical specifications

Key features:

• Utilizes metal-halide catalysts such as NaCl, KCl, and MgCl2 to facilitate HDPE deconstruction.
• Operates at reduced temperatures (300-425°C) and shorter reaction times (1-4 hours).
• Employs a slurry of metal halide and high molecular weight wax to enhance mass transfer.
• Produces waxes with controlled molecular weight profiles and reduced polydispersity.
• Investigates recyclability of catalysts and by-products to enhance process sustainability.

Technology readiness level

This technology is at TRL 3, indicating that it has been demonstrated analytically and experimentally at a laboratory scale. Future validation plans include optimizing reaction conditions, performing techno-economic analysis, and exploring catalyst recyclability and by-product utilization.