METHOD OF PREPARING BEAD CRACKING CATALYST

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FIELD : chemistry.SUBSTANCE : present invention relates to oil refining, particularly to a method of preparing a bead platinum and zeolite-containing catalyst for cracking oil fractions. Described is a method of preparing the catalyst, involving mixing an aqueous suspension of zeolite Y with a suspension of alumina, sodium silicate solution with modulus-molar ratio SiO2/Na2O equal to 2.2-3.0, aluminium sulphate solution and chloroplatinic acid solution; moulding catalyst granules in a column with mineral oil; successive activation, first with a mixture of sodium sulphate and aluminium sulphate solutions with concentration of the latter equal to 0.1-4 g/dm3, then with aluminium sulphate solution with concentration of 4-10 g/dm3, and then with a solution of a mixture of nitrates of rare-earth elements; washing; drying and calcination of the granules in an atmosphere of flue gases and water vapour.EFFECT : higher activity and apparent density of the catalyst.1 tbl, 4 ex