Production of high-quality silicon carbide using the patented RECOSiC recycling process with an improved CO₂ balance.
ESK-SIC GmbH
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About ESK-SIC
ESK-SIC GmbH is a German company in the silicon carbide industry and a manufacturer of high-quality raw silicon carbide (SiC) with a significantly improved CO₂ balance. The core of the offering is the patented RECOSiC process, which was developed jointly with Fraunhofer IKTS and patented worldwide in 2021. The recycling process recycles by-products of the Acheson process, by-products of SiC processing, and SiC-containing industrial waste, converting them materially into SiC crystals with a purity of over 98%. The material properties of the recycled products are identical to or improved compared with commercially available products from the traditional Acheson process. The Acheson process requires around 7.15 MWh of electrical energy and causes about 4.2 tons of CO₂ per ton of raw SiC, whereas material recycling produces less than one ton of CO₂ per ton of SiC. The construction of the company's own production facility, the RECOSiC factory, is being subsidized with 30 million euros by the state of North Rhine-Westphalia and the European Union.
- Processes
- RECOSiC – recycling process for the production of high-quality raw SiC (silicon carbide) from, Recycling of used SiC material into high-quality raw SiC (patented RECOSiC process), Production of SiC material with an improved CO₂ balance
- Materials
- Silicon carbide (SiC), RECOSiC process
- Industries
- Silicon carbide industry
- 01
Collection of SiC-containing waste and by-products (e.g., Acheson process)
- 02
Material conversion into SiC crystals (RECOSiC process)
- 03
Established powder processing methods
- 04
Distribution of high-quality raw SiC with an improved CO₂ balance
Materials & Processes
Silicon carbide (SiC)
High-quality raw SiC with >98% purity, produced through recycling instead of the energy-intensive Acheson process.
RECOSiC process
Patented recycling process for the material conversion of SiC-containing waste into novel raw SiC with approximately 90% lower raw-material-related and approximately 75% lower energy-related emissions.
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| RECOSiC – recycling process for the production of high-quality raw SiC (silicon carbide) fromOther (recycling/material production) | – | – | – | – | Silicon carbide (SiC, purity >98%) |
Additional services
History
- Mitte der
ESK-SIC GmbH and Fraunhofer IKTS begin joint research into SiC recycling as an alternative to the Acheson process.
- 2021
Worldwide patenting of the recycling process by ESK-SIC GmbH and Fraunhofer IKTS.
- 2025
Awarded “TOP 100 company” for the third time.
Construction of the RECOSiC factory funded with 30 million euros by the State of NRW and the EU.