vacuum distillation furnace for separation of copper and zinc, increase the purity of zinc recovery and reduce oxidation losses, making the process cleaner. NY ...

Refinery vacuum distillation units (VDUs) use ejector systems to establish and maintain distillation-column pressure for capturing valuable crude fractions and reducing vacuum residuum. Reliable ...

Three DARPA-funded research teams have completed a foundational study of chip-scale vacuum pumps by inventing three very different approaches to removing air from a sample chamber with a volume of one ...