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Raschig ring

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Raschig rings are used in commercial fractional distillation columns to prevent low pressure loss, while maintaining good efficiency and economy.

Rashig rings are small tube cuttings providing a surface for (re)evaporation of the most volatile part in the refluxing distillate, typically 10 mm in diameter and 12 mm long. These can be made from metal, glass, or can be ceramic. Raschig rings made of copper tube cuttings are superior at fractionating volatile hydrocarbons (or ethanol) mixed with water.


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