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F25J 1/00
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Processes or apparatus for liquefying or solidifying gases or gaseous mixtures |
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F25J 1/02
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Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen |
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F25J 3/00
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Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification |
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F25J 3/02
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Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream |
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F25J 3/04
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Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air |
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F25J 3/06
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Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification by partial condensation |
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F25J 3/08
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Separating gaseous impurities from gases or gaseous mixtures |
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F25J 5/00
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Arrangements of cold-exchangers or cold-accumulators in separation or liquefaction plants |
