(0)F25J:0/0:
IPC6
SECTION F - MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS;BLASTING
LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR...
F25J
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F 25 J

 LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT (cryogenic pumps F 04 B 37/08; gas storage vessels, gas-holders F 17; filling vessels with, or discharging from vessels, compressed, liquefied, or solidified gases F 17 C ; refrigeration machines, plants, or systems F 25 B)

 

 

 
 

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/ 00 Processes or apparatus for liquefying or solidifying gases or gaseous mixtures

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/ 02 • requiring the use of refrigeration, e.g. of helium or hydrogen  
 

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/ 00 Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification

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/ 02 • by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream (F 25 J 3/08 takes precedence)  

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/ 04 • • for air  

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/ 06 • by partial condensation (F 25 J 3/08 takes precedence; by rectification F 25 J 3/02)  

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/ 08 • Separating gaseous impurities from gases or gaseous mixtures (cold traps B 01 D 8/00)  
 

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/ 00 Arrangements of cold-exchangers or cold-accumulators in separation or liquefaction plants (heat-exchangers F 28 C, F 28 D, F 28 F)