matterr to Build Depolymerisation Plant at Chemiepark Knapsack

Key highlights
  • The plant will have an annual capacity of 10,000 tonnes.
  • Groundbreaking is scheduled for 2026.
  • The process converts PET waste into virgin-quality products.
  • Chemiepark Knapsack hosts multiple recycling-focused companies.
Related project For subscribers
Milestones, plant data, involved companies (owners, investors, licensors, contractors) and news — kept up to date.
Matterr Hürth small-scale depolymerisation plant · Germany
Under Construction
~2024
2025-09
—
2026

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 advance 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 purified components can then be used in existing polyester production facilities to create virgin-quality products, replacing fossil-based feedstocks.

Strategic Location and Partnerships

The Chemiepark Knapsack site offers integrated infrastructure that supports matterr's operations. The location aligns with the company's focus on promoting the circular economy. Collaboration with YNCORIS, which operates the park, is crucial for transitioning from pilot to industrial scale, leveraging YNCORIS's experience in plant construction and integration.

Ongoing Transformation

Chemiepark Knapsack has been shifting towards a circular economy for several years, with matterr being the third recycling-focused company on site. Other initiatives include LyondellBasell's integrated recycling and downstream processing center for plastic waste 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.

Source: matterr

chemXplore Weekly

The week’s project milestones and project news from the chemical industry, free every Wednesday.

Free. One email a week. Unsubscribe any time.

Related articles

22 August 2025
EEW Explores CO₂ Capture at Knapsack for Climate Goals

The project studies CO₂ capture from waste incineration, aiming for climate neutrality. Success depends on political and financial support.

20 August 2026
matterr secures non‑refundable ERDF and Lower Saxony grant for ReNaTe

Project will valorise PET recycling side streams to create marketable outputs and improve resource efficiency of matterr’s chemical recycling process.

20 August 2025
matterr and BESTSELLER Partner to Scale Polyester Recycling

The partnership aims to scale polyester recycling, reduce fossil resource use, and cut emissions with a new plant in Germany processing 10,000 tonnes of waste annually by 2026.

11 August 2025
matterr Secures €30M EU Grant for Polyester Recycling Plant

The €63M project will build a 10,000-tonne polyester recycling plant in Germany by 2027, aiming to transform waste into high-quality feedstock for packaging and textiles.