A modifier on the basis of the tin salts of synthetic fatty acids for zeolite-containing cracking catalysts

The procedure of preparation of a tin-containing modifier for cracking cata lysts was developed. The process was conducted as a one-pot synthesis by re acting the tin metal with industrially produced C-7-C-9 synthetic fatty aci ds, with air bubbling through the reaction mixture. The application of the modifier increases the resistance of microspherical, zeolite-containing cra cking catalysts to poisoning with the vanadium that is present in heavy pet roleum feedstock.