Definition of Raschig ring in English:

Raschig ring

noun

(also Raschig's ring)
Chemistry
  • A small cylindrical ring usually made of glass, metal, or ceramic material, and used in large numbers as packing in towers and columns for fractionation, solvent extraction, etc.

    The use of such rings was introduced by Raschig.

Origin

1920s; earliest use found in Chemical Abstracts.