Processes or apparatus involving steps for the removal of impurities

Child Classifications

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• F25J 2220/02 Separating impurities in general from the feed stream
• F25J 2220/04 Separating impurities in general from the product stream
• F25J 2220/40 Separating high boiling, i.e. less volatile components from air, e.g. CO2, hydrocarbons
• F25J 2220/42 Separating low boiling, i.e. more volatile components from nitrogen, e.g. He, H2, Ne
• F25J 2220/44 Separating high boiling, i.e. less volatile components from nitrogen, e.g. CO, Ar, O2, hydrocarbons
• F25J 2220/50 Separating low boiling, i.e. more volatile components from oxygen, e.g. N2, Ar
• F25J 2220/52 Separating high boiling, i.e. less volatile components from oxygen, e.g. Kr, Xe, Hydrocarbons, Nitrous oxides, O3
• F25J 2220/60 Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
• F25J 2220/80 Separating impurities from carbon dioxide, e.g. H2O or water-soluble contaminants
• F25J 2220/90 Separating isotopes of a component, e.g. H2, O2