Process for the purification of nitric oxide

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component

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423405, 95129, 95902, B01J 800

Patent

active

056701250

ABSTRACT:
A gas mixture comprised of nitric oxide and, optionally an inert gas, and containing small amounts of nitrogen dioxide, and perhaps moisture and sulfur dioxide, is purified by passing the gas stream through a bed of zeolite having a silica to alumina ratio not greater than about 200. The concentration of nitrogen dioxide, sulfur dioxide and moisture in the gas stream are reduced to about 1 ppm or less as the gas mixture passes through the bed of zeolite.

REFERENCES:
patent: 2882243 (1959-04-01), Milton
patent: 3674429 (1972-07-01), Collins
patent: 5158582 (1992-10-01), Onitsuka et al.
patent: 5417950 (1995-05-01), Sheu et al.
patent: 5514204 (1996-05-01), Sheu et al.

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