In 2023, Aurubis announced a comprehensive makeover of its precious metals refinery. In addition to upgrading precious metals’ security and occupational safety, Aurubis is raising the bar with the innovative process technology realized in this project. Today’s process is based on refining a silver Doré in a Möbius type silver electrolysis and subsequently treating the residual anode slime in a combined nitric/chloride gold refining and platinum group metals (PGM) solution production. In the future, Aurubis will still rely on silver electrorefining but with significantly increased contents of gold and PGMs and much higher current densities remarkably speeding up the refining. The resulting anode slimes will be treated in a direct chloride leach making it faster and decreasing its environmental impact. In this chapter, we will discuss the role of R&D at the different stages of the project. Based on a feed assumption different flowsheet options were evaluated in an ideation phase. In the following, we conducted lab tests to develop the selected flowsheets. Finally, the flowsheet was piloted and some parts were even tested for full production scale. All these results were used to compile process design criteria which are being used for the ongoing engineering of the new plant. In addition to the general aspects of the transformation itself, we will focus on the different key development steps and challenges during the individual stages of the project. The newly developed metallurgical process leads to higher efficiency, which will considerably reduce throughput times for materials containing precious metals.