FIELD: chemistry.
SUBSTANCE: invention relates to crystalline compositions of RHO zeolite with improved homogeneity of morphology. Said compositions of RHO are suitable for preparing cation-exchange zeolites RHO, which can be used as oxygen and/or nitrogen adsorbents with improved properties. Crystallized NaCsRHO zeolite has Si/Al ratio of 3.1 to 3.6. Zeolite capacity for O2 is less than 0.015 mmol/g. Adsorbents can be used in adsorption at variable pressure for selective adsorption of oxygen and/or nitrogen from streams of raw material, such as air flow or crude argon flow. In addition, disclosed are methods of producing zeolites RHO with improved control of morphology.
EFFECT: reduced adsorption capacity of oxygen, which improves separation of oxygen from mixtures containing other gases.
19 cl, 1 dwg, 3 tbl, 11 ex
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