Passivation of metals on cracking catalyst with a crude antimony tris(O,O-dihydrocarbyl phosphorodithioate)

摘要

A hydrocarbon cracking catalyst is treated with a crude antimony tris(O,O-dihydrocarbyl phosphorodithioate) to passivate thereon contaminating metals, e.g., vanadium, iron and/or nickel. Used or unused catalyst can be treated.