Sweetening of petroleum distillates - with metal chelate catalyst impregnated on basic anion-exchange resin

摘要

Sweetening of sour petroleum distillates is carried out by contacting with an oxidising agent (pref. air) and a catalyst comprising a metal chelate impregnated on basic anion-exchange resin. Anion exchange resin is pref. porous styrene-divinylbenzene polymer with primary, sec., tert. or quat. amine functions. Metal chelate is pref. metal phthalocyanine, esp. a Co or V phthalocyanine sulphonate. Process is capable of converting oxidn.-resistant mercaptans into disulphides in highly olefinic gasoline distillates (esp. FCC gasoline) without excessive gum formation; alkaline reagents are not necessary.