Depolymerization Technology Chemical Recycling Guide

Depolymerization breaks polymers into monomers for virgin-quality recycled materials, enabling true circular economy for plastics that mechanical recycling cannot process.

Technology Types

Methanolysis

For PET recycling. Produces DMT (Dimethyl Terephthalate) and EG (Ethylene Glycol). Commercially established with major players including Eastman.

Hydrolysis

For PA (Nylon) and PET. Water-based depolymerization at elevated temperature and pressure. Higher energy requirements but handles mixed inputs.

Glycolysis

For PET and polyurethane. Uses glycol to break polymer bonds. Lower severity conditions, suitable for certain waste streams.

Enzymatic

For PET. Uses enzymes (cutinases) to break polymer at mild temperatures. Emerging technology with commercial-scale demonstrations.

Applications

Bottle-to-bottle recycling maintaining food-grade quality
Nylon carpet recycling to monomer feedstocks
Polycarbonate waste conversion to BPA

Commercial Status

Several commercial plants operational and under construction. Eastman, Loop Industries, and jeplan lead commercialization efforts.

Economic Considerations

Capital costs higher than mechanical recycling. Operating costs depend on energy prices. Virgin-quality outputs command premium pricing.

Depolymerization essential for closing the loop on complex plastic waste streams.

Depolymerization Technology Chemical Recycling Guide