FIELD: chemistry.
SUBSTANCE: invention relates to method of obtaining catalyst used for conversion of oxygen-containing compounds into light olefins. Described is method of obtaining silicoalumophosphate molecular sieves which includes: first, obtaining reaction mixture containing definite amount of primer which contains from 8 to 20% (weight) of silicon oxide calculated per amount of dry oxide, aluminium source, phosphorus source, at least one organic template and silicon source with further stimulation of formation of crystals of silicoalumophosphate molecular sieves and their separation. Also described is catalyst of conversion of oxygen-containing compounds into olefins, where oxygen-containing compounds are methanol and/or dimethyl alcohol, containing crystalline silicoalumophosphate molecular sieves, where first part of said crystalline silicoalumophosphate molecular sieves contains from 8 to 20% (weight) of silicon dioxide and where the second part of said crystalline silicoalumophosphate contains from 1 to 5% (weight) of silicon dioxide.
EFFECT: obtaining catalyst based on molecular sieves characterised by lower defect density and better selectivity with respect to light olefin obtaining.
9 cl, 1 ex
