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Home NEWS Science News Chemistry

Reinhart Koselleck Project for TUD Chemist Jan J. Weigand: Sustainable Chemistry and Phosphorus Recycling

Bioengineer by Bioengineer
July 12, 2023
in Chemistry
Reading Time: 3 mins read
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Prof. Jan J. Weigand
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Recently, the team led by chemist Prof. Jan J. Weigand announced a significant breakthrough in phosphorus chemistry. In a publication in Nature Synthesis, they introduced an innovative and simple method for producing phosphorus-based chemicals without the use of hazardous intermediates such as white phosphorus.

Prof. Jan J. Weigand

Credit: AK Weigand

Recently, the team led by chemist Prof. Jan J. Weigand announced a significant breakthrough in phosphorus chemistry. In a publication in Nature Synthesis, they introduced an innovative and simple method for producing phosphorus-based chemicals without the use of hazardous intermediates such as white phosphorus.

In the next step, the team aims to expand the range of phosphorus-based chemicals that can be produced using this novel method, thereby enabling a direct and more sustainable access to a variety of platform chemicals. Phosphorus and its compounds are indispensable in our daily lives – their application in fertilizers alone is crucial and contributes significantly to feeding the world’s population. Out of the globally mined 190 million tons of raw phosphorus per year, 80 percent is processed into fertilizers. However, the current wasteful handling of this essential elements leads to the depletion of natural and available phosphorus reserves on Earth. As a result, phosphate rock and elemental phosphorus have been included in the list of critical raw materials. Projections suggest that global reserves could be depleted within 100 years. “For these reasons, the development of new and innovative chemical methods in the phosphorus value chain is urgently needed. The issue of phosphorus recovery through truly suitable large-scale recycling processes for valuable phosphorus compounds will become significantly more challenging in the future,” explains Dr. Kai Schwedtmann, a key member of Jan J. Weigand’s team and co-inventor of the patents underlying this project.

In a highly exploratory project, Prof. Weigand’s team aims to explore electrochemical methods for recycling phosphorus-based chemicals in an efficient circular process. “In our blueprint for a modern sustainable phosphorus chemistry, we are investigating systematic and progressively atom- and energy-efficient pathways for the deoxygenation of phosphoric acid and recycled phosphorus resources such as phosphoric acid and struvite from sewage sludge treatment or lithium iron phosphate from battery recycling. An extension of this approach is the synthesis of various hexafluorophosphate (PF6) salts, starting from highly problematic substances like uranium hexafluoride (UF6), which contains one of the key anions, PF6–, for battery electrolytes,” explains Prof. Weigand, Chair of Inorganic Molecular Chemistry at TUD.

Jan J. Weigand is also a member of the international expert pool at the Center for Transformation of Chemistry (CTC) and emphasizes the significance of this project in the context: “The vision of the CTC to transform the chemical industry towards a sustainable circular economy is of central importance. Our research aims to develop innovative solutions that are closely aligned with the goals of the CTC, focusing on the sustainable use of resources and the reduction of environmental impacts. We are proud to contribute our expertise to this groundbreaking project and make a significant contribution to the transformation of the chemical industry, particularly in the field of phosphorus chemistry and recycling.”

The German Research Foundation (DFG) supports this ambitious endeavor for the next five years through a Reinhart Koselleck Project, named after the German historian Reinhart Koselleck (1923-2006). This funding provides exceptional scientists with the opportunity to carry out highly innovative and positively risk-prone projects.



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