Cracking catalyst passivated with a crude antimony phosphorodithioate

Claim 2

A cracking catalyst suitable for cracking a hydrocarbon which has been treated to passivate a contaminating metal whenever it appears thereon by incorporating with said catalyst, a crude antimony tris(O,O-dihydrocarbyl phosphorodithioate).

Claim 3

A catalyst according to claim 1 wherein the antimony compound is represented by the formula [(RO) 2 PS 2 ] 3 Sb, wherein the R groups, which can be different, are hydrocarbyl radicals, each containing from 1 to about 18 carbon atoms.

Claim 4

A cracking catalyst according to claim 1 wherein the antimony compound is at least one compound selected from the compounds following: antimony tris(O,O-dimethyl phosphorodithioate), antimony tris(O,O-diethyl phosphorodithioate), antimony tris(O,O-dipropyl phosphorodithioate), antimony tris(O,O-diisobutyl phosphorodithioate), antimony tris(O,O-dihexyl phosphorodithioate), antimony tris[O,O-bis(2-ethyloctyl) phosphorodithioate], antimony tris(O,O-dipentadecyl phosphorodithioate), antimony tris(O-octadecyl O-cyclohexyl phosphorodithioate), antimony tris(O,O-dicylohexyl phosphorodithioate), antimony tris[O,O-bis(3-methylcyclopentyl) phosphorodithioate], antimony tris[O,O-bis(cyclopentylmethyl) phosphorodithioate], antimony tris(O,O-diphenyl phosphorodithioate), antimony tris(O,O-di-p-tolyl phosphorodithioate), antimony tris(O,O-dibenzyl phosphorodithioate), and antimony tris(O-butyl O-phenyl phosphorodithioate).

Claim 5

A catalyst according to claim 1 wherein the antimony compound is crude antimony tris(O,O-dipropyl phosphorodithioate).