FIELD: chemistry.
SUBSTANCE: invention describes a method of reducing NOx emissions from a regeneration area during catalytic cracking of hydrocarbon material in the presence of a fluidised catalyst to obtain low molecular weight components, involving a) contact between hydrocarbon material during a fluidised catalyst cracking process (FCC) in which NOx is emitted from the regeneration area of a catalytic cracking unit (FCCU) working under FCC conditions in the presence of circulating FCC cracking catalyst and a fine catalyst/additive composition which reduces NOx, having average particle size greater than 45 mcm, containing (i) at least 10 wt % NOx which reduces a zeolite-containing component selected from a group comprising zeolite-beta, MSM-49, mordenite, MSM-56, zeolite-L and mixtures thereof, and (ii) 5-50 wt % inorganic binding substance selected from a group comprising aluminium oxide, silicon oxide, aluminium silicate, aluminium phosphate, mixtures thereof; and b) reducing amount of NOx emissions from the regeneration area of the FCCU. Described also is a fluidised catalyst cracking composition (FCC), containing (a) a FCC cracking component suitable for catalysing cracking of hydrocarbons in FCC conditions, and b) a fine catalyst/additive composition which reduces NOx, described above. Described also is a method of reducing NOx emissions from the regeneration area during liquid-phase catalytic cracking of hydrocarbon material into low molecular weight components, involving contact between hydrocarbon material and a cracking catalyst at high temperature during which low molecular weight hydrocarbons are formed, where the cracking catalyst contains the composition described above.
EFFECT: method of reducing NOx emissions from the regeneration area during catalytic cracking of hydrocarbon material in the presence of the described catalyst and fine catalyst/additive composition reduces NOx emissions and enables control of formation of NOx without changing or affecting conversion of hydrocarbons or output of the cracking products formed during the FCC process.
44 cl, 5 tbl, 6 ex, 1 dwg
