(N(But)4)5H4PV6Mo6O40 as an efficient catalyst for the oxidative desulphurisation of gasoline

Abstract

The oxidative desulphurization (ODS) of gasoline and model compounds that exist in gasoline with hydrogen peroxide using (N(But)4)5H4PV6Mo6O40 as a scavenger has been studied. This keggin-type polyoxometalate was shown to be able to scavenge hydrogen sulphide and mercaptans in high yields. This system provides an efficient, convenient and practical method for scavenging sulphur compounds. This quaternary ammonium keggin type polyoxometalate ((N(But)4)5H4PV6Mo6O40) which has lipophilic cation can better act as phase transfer agent and better transfer the peroxometal anion into organic phase. That is, the oxidation reactivity of the catalysts depends on the type of countercation: ((C4H9)4N) + > NH4+ > K+.

Keywords

• Keggin type polyoxometalate
• countercation
• mercaptan
• gasoline
• demercaptanization