CO₂ technology competes as one of top three inventions

  • Dr. Christoph Gürtler and Prof. Walter Leitner nominated in the Industry category
  • CO made commercially viable as a raw material
  • Technology forms the basis for a large number of marketable products

Covestro's CO₂ technology continues to write its success story. The European Patent Office (EPO) has announced the nomination of the two German chemists, Dr. Christoph Gürtler (Covestro AG) and Prof. Walter Leitner (Max Planck Institute for Chemical Energy Conversion and RWTH Aachen University), as finalists in the "Industry" category of the 2021 European Inventor Award for their role in developing a new technology for using carbon dioxide (CO₂). This technology enables the harmful climate gas CO₂ to be used as a valuable raw material for sustainable plastics. Their process deploys chemical catalysts to drive reactions between CO₂ and a conventional raw material. This process creates so-called polymers in a more sustainable and economically viable way. CO₂ is firmly incorporated in the process.

"This nomination is an important confirmation of our efforts towards making chemistry more sustainable. It shows how crucial patents are for the development process of a technology," says Christoph Gürtler, who is responsible for the development of new processes and products at Covestro. "It is a tremendous honor to be part of the award ceremony on behalf of the interdisciplinary team from product research, process development, marketing and the many other minds driving our invention."

Successful cooperation between industry and science

"The plastics industry can make a significant contribution to combating climate change by switching to greenhouse gas-neutral production. To achieve this, we need to break away from petroleum and use alternative raw materials such as CO₂", says Dr. Markus Steilemann, CEO of Covestro. "The nomination for the European Inventor Award is an endorsement of our company as a pioneer in this field. I would like to extend my sincere congratulations to the many colleagues, including those at our partners, who contributed to the development of the innovative CO₂ technology – a genuine sustainability highlight." 

The two nominees, Gürtler and Leitner, have played a significant role in the development and market launch of the platform technology, which originated in the collaboration between application-oriented science and research-oriented industry. Their involvement in a large number of patents related to the use of CO₂ is proof of this: together, the two hold over 100 patents on CO₂ technology.

Breakthrough in catalysis research yields success

Covestro and RWTH Aachen University founded the CAT Catalytic Center in 2007. "The scientific community has long had the desire to be able to use carbon dioxide as a supplier of carbon for plastics. Experts have been working on this issue for nearly half a century," explains Walter Leitner.

CO₂ forms chemical compounds only with great difficulty. This is the problem that Christoph Gürtler and Walter Leitner's team had to solve. The team combined industrial and academic expertise. A great deal of creativity, perseverance and many experiments with catalysts finally culminated in success. The breakthrough was achieved by precisely controlling the reaction between CO₂ and the petroleum-based propylene oxide in the presence of a customized catalyst system. "We collaborated closely to develop the right catalyst that led us to success," says Gürtler.

The resulting so-called polyol was introduced to the market by Covestro under the product name cardyon®. It is already being used to produce soft foam for mattresses, for adhesives in sports floors, padding in shoes and in car interiors. Elastic textile fibers are currently on the threshold of market maturity. Research projects have successfully demonstrated that CO₂ can also be deployed for insulating materials made of rigid foam and for surfactants, for example in detergents.

Contributing to resource conservation and the circular economy

The use of CO₂ contributes significantly to the circular economy. Replacing conventional crude oil as a carbon source in part with the climate gas CO₂ preserves resources. The carbon, in turn, remains in the cycle without being released into the atmosphere. Moreover, initial studies have also shown that this technology makes it possible to produce more recyclable plastics whose components can be more easily recycled. An all-round sustainable innovation.

Launched in 2006, the European Patent Office's Inventor Award distinguishes outstanding European inventors and teams and is one of the most prestigious awards of its kind. The award ceremony will take place online for the first time on June 17 and will be broadcast live on the Internet. Three teams are nominated in the Industry category.

  • Production waste is a valuable raw material
  • Reprocessing on an industrial scale possible
  • Contribution to more sustainability and resource conservation

The Maezio® brand of continuous fiber-reinforced polycarbonate composites (CFRTPs) developed by Covestro are characterized by their extremely light weight, very high strength and exceptional flexibility of design. This means that waste generated during the production of composites also becomes a valuable raw material. However, because they consist of different materials that cannot be easily separated from one another, the recycling of composites is a challenge. Covestro is cooperating with recycling specialist carboNXT® on this. It has developed a process that allows the waste to be processed on an industrial scale.

"We are very excited about this joint solution, as we cannot process the materials ourselves for technical reasons," explains Lisa Ketelsen, Head of Thermoplastic Composites at Covestro. "By recycling according to type at our partner's plant, the raw materials can be converted back into valuable products with similarly good properties as those characteristic of virgin materials. The recycling of materials makes it possible to use them again in other products. In this way, we save raw material resources and contribute to the focus on the circular economy."

"Our company has many years of experience in recycling carbon fiber-reinforced thermoplastics and has the necessary plant technologies to process such waste. We were therefore the partner of choice for this task," says Tim Rademacker, general manager at Mitsubishi Chemical Advanced Materials and responsible for the carbon fiber recycling business. "From the processed waste, we produce high-quality new compounds of carbon fiber-reinforced polycarbonate for Covestro at CarboNXT®."

Demand for such recycled products is high because they are valuable raw materials, but also because more and more industrial customers and consumers are looking for more sustainable products. The project will now be further developed to market maturity by Covestro, Mitsubishi Chemical Advanced Materials and possibly other partners. It is part of a global strategic program with which Covestro is focusing all its energy on the circular economy.


About Covestro:

With 2020 sales of EUR 10.7 billion, Covestro is among the world’s leading polymer companies. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative, sustainable solutions for products used in many areas of daily life. In doing so, Covestro is fully committed to the circular economy. The main industries served are the automotive and transportation industries, construction, furniture and wood processing, as well as electrical, electronics, and household appliances industries. Other sectors include sports and leisure, cosmetics, health and the chemical industry itself. At the end of 2020, Covestro has 33 production sites worldwide and employs approximately 16,500 people (calculated as full-time equivalents).

Find more information at www.covestro.com

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Forward-looking statements

This news release may contain forward-looking statements based on current assumptions and forecasts made by Covestro AG. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in Covestro’s public reports which are available at www.covestro.com. The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.