Process for preparing ultra-pure nitrogen

Details Process for preparing ultra-pure nitrogen Process for preparing ultra-pure nitrogen

1991-04-15

1993-08-24

Langel, Wayne

Chemistry of inorganic compounds

Nitrogen or compound thereof

203 49, 423247, C01B 2104, C01B 3118

Patent

active

052386708

ABSTRACT:
Process and apparatus for preparing ultra-pure nitrogen containing less than 100 ppb (parts per billion) impurities, characterized in that at least the impurities consisting of carbon monoxide (CO) and/or hydrogen (H.sub.2) are removed by passing the gas from which at least one of these two components has to be removed, over a bed of particles including a metallic element namely copper (Cu) and/or ruthenium (Ru) and/or rhodium (Rh) and/or palladium (Pd) and/or osmium (Os) and/or iridium (Ir) and/or platinum (Pt) supported on a particulate support, by the technique of ion exchange and/or by the technique of impregnation. This technique enables to produce ultra-pure nitrogen by using it on air to be distilled as an additional step for the removal of CO.sub.2 and H.sub.2 O.

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