Production of ultrahigh purity nitrogen

Details Production of ultrahigh purity nitrogen Production of ultrahigh purity nitrogen

1992-10-01

1996-09-03

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

62648, 62908, 95106, 95126, 95130, F25J 300

Patent

active

055512577

ABSTRACT:
Apparatus and a process for producing nitrogen or air containing not more than 0.5 ppm by volume of carbon monoxide. A nitrogen stream or air stream containing up to about 100 ppm by volume of carbon monoxide is subjected to cryogenic temperature swing adsorption in an adsorption bed containing calcium-exchanged type X zeolite, type 5A zeolite or 13X zeolite, which removes substantially all of the carbon monoxide from the nitrogen stream or air stream.

REFERENCES:
patent: 3447331 (1969-06-01), Smith
patent: 4746332 (1988-05-01), Tomomura et al.

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