FIELD: production of high-silica zeolites for use as components of catalysts and adsorbents. SUBSTANCE: feedstock is prepared from precursors containing silicon, aluminium, alkali and water. Reaction feedstock mixture is held at zeolite crystallization temperature followed by rising temperature of zeolite-containing slurry by 10-40 C by holding mixture at this temperature for 1-5 h. Then, without diminishing crystallinity of zeolite, slurry is cooled down to 50 C at cooling rate 5-10 C/h, whereafter zeolite is separated from mother liquor, washed and dried. EFFECT: higher quality of zeolites. 2 cl, 1 tbl
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