- Groundbreaking for the plant is scheduled for 2026.
- The plant will have an annual capacity of around 10,000 tonnes.
- The process converts PET waste into virgin-quality products.
- Chemiepark Knapsack is advancing its shift toward circular economy.

Project Overview
Recycling company matterr is set to build a small-scale industrial depolymerisation plant at Chemiepark Knapsack, specifically in the Hürth section. The facility will have an annual capacity of approximately 10,000 tonnes and aims to contribute to a fossil-free, circular PET industry. Groundbreaking is planned for 2026.
Innovative Recycling Technology
matterr's patented depolymerisation process targets complex, mixed PET waste streams, such as blended textiles and multi-layer packaging. The process operates under mild conditions at atmospheric pressure, converting waste back into original molecular building blocks. These components, once purified, can be used in existing polyester production facilities to create virgin-quality products, replacing fossil-based feedstocks.
Strategic Location
Chemiepark Knapsack is chosen for its focus on promoting the circular economy, aligning with matterr's objectives. The site offers integrated infrastructure, which matterr will leverage for its operations. The collaboration with YNCORIS, which operates the park, is crucial for transitioning from pilot to industrial scale.
Advancing Circular Economy
Chemiepark Knapsack has been progressing towards a circular economy, with matterr being the third recycling-focused company on site. Other initiatives include LyondellBasell's integrated recycling and processing center and Palurec's beverage carton recycling facility. The park also features a waste-to-energy plant that has been operational since 2009, providing steam from non-recyclable residues for energy supply.