Raschig ring
Revision as of 00:10, 25 September 2017 by Uncle Jesse (talk | contribs)
Pieces of tube, approximately equal in length and diameter, used in large numbers as a packed bed within columns for distillation and other chemical engineering processes. They are usually ceramic or metal and provide a large surface area within the volume of the column for interaction between liquid and gas vapors. Raschig rings are named after their inventor, the German chemist Friedrich Raschig.