FIELD: chemical engineering. SUBSTANCE: invention relates to gas separation technology on zeolites and is intended for separation of variable-composition gases into oxygen- and nitrogen-enriched gases with constantly increasing oxygen concentration. Such process is used, for example, in medicine when oxygen- therapy gas is recuperated. Method of invention involves raising pressure in zeolite-containing adsorbers and blowing adsorbers with variable-composition gas to form oxygen-enriched gas and then lowering pressure therein to form nitrogen-enriched gas. Utilized variable-composition gas is gas with constantly increasing oxygen concentration, and blowing of adsorbers is effected with atmosphere air. EFFECT: increased degree of separation of variable-composition gas. 4 cl, 1 dwg
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