Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification

Introduced: September 1968

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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F25J 3/02 by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream (F25J3/08 takes precedence ) +3 CPC IPC+CPC Available in IPC and CPC
F25J 3/06 by partial condensation (F25J3/08 takes precedence; by rectification F25J3/02 ) +3 CPC IPC+CPC Available in IPC and CPC
F25J 3/08 Separating gaseous impurities from gases or gaseous mixtures (cold traps B01D8/00) IPC+CPC Available in IPC and CPC