LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT

**Definition:** This place covers:

Processes or systems for liquefying or solidifying gases or gaseous mixtures and for separating the constituents of gaseous or liquid mixtures involving the use of liquefaction or solidification by rectification or partial condensation, the processes or systems use internal and/or external refrigeration to reach very low temperatures, i.e. so-called cryogenic temperatures, in general well below -50°C;

Arrangements of cold exchangers or cold accumulators in cryogenic separation or liquefaction plants.