Nissan Motor Co., Ltd. and Waseda University announced the start of testing in Japan of a jointly developed recycling process that efficiently recovers high-purity rare-earth compounds from electrified vehicle motor magnets. The testing is aimed at enabling practical application of the new process by the mid-2020s. The automotive industry is promoting vehicle electrification to tackle climate change and to realize a carbon-neutral society. Most motors in electrified vehicles use neodymium magnets, which contain scarce rare-earth metals such as neodymium and dysprosium. Reducing the use of scarce rare earths is important not only because of the environmental impact of mining and refining, but also because the shifting balance of supply and demand leads to price fluctuations for both manufacturers and consumers. To use limited and valuable resources more effectively, since 2010 Nissan has been working from the design stage to reduce the amount1 of heavy rare-earth elements (REEs) in motor magnets. In addition, Nissan is recycling REEs by removing magnets from motors that do not meet production standards and returning them to suppliers. Currently, multiple steps are involved, including manual disassembly and removal. Therefore, developing a simpler and more economical process is important to achieve increased recycling in the future. Nissan has been collaborating with Waseda University, which has a strong track record of researching non-ferrous metal recycling and smelting. In March 2020 the collaboration successfully developed a pyrometallurgy process that does not require motor disassembly. A carburizing material and pig iron are added to the motor, which is then heated to at least 1,400 C and begins to melt. 2. Iron oxide is added to oxidize the REEs in the molten mixture. 3. A small amount of borate-based flux, which is capable of dissolving rare-earth oxides even at low temperatures and highly efficiently recovering REEs, is added to the molten mixture. 4. The molten mixture separates into two liquid layers, with the molten oxide layer(slag) that contains the REEs floating to the top, and the higher density iron-carbon(Fe-C) alloy layer sinking to the bottom. 5. The REEs are then recovered from the slag.