COMPOSITION FOR REDUCING OX EMISSIONS IN FCC REGENERATION PROCESS

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A composition comprising FCC catalyst particles and additive particles suitable for the reduction of NOx emissions from a FCC regenerator, said additive particles comprising a Mg and Al-containing anionic clay or solid solution, a rare earth metal oxide, alumina and/or silica-alumina, and Y-typ e zeolite. The invention further relates to a process for preparing such a composition and its use for reducing NOx emissions.