The earliest evidence for intermittently replenished water-cooled distillation excavated from Haihunhou’s Tomb in Jiangxi, China

Distillation is among humanity’s oldest purification technologies. However, the paucity of well-preserved material evidence has long constrained our understanding of the early development of distillation, a technology largely reconstructed from written records alone. By integrating archeological context, structure–function analysis, and reproducible experimental validation, we identify the world’s earliest empirically verified example of an intermittently replenished water-cooled distillation apparatus, as well as the earliest archeologically intact still yet discovered. The apparatus was unearthed from the first century BCE tomb of the Marquis of Haihun in Jiangxi, China. Previously, intermittently replenished water-cooled distillation was believed to have emerged only in the thirteenth century. This apparatus also represents the earliest known still with the potential for continuous water-cooling. By providing a rare, experimentally validated example that illuminates the developmental trajectory of early distillation technology, this study offers key insights into the intersection of ancient technical traditions and the foundations of modern chemistry.