Polyoxometalates as the catalysts for tertiary ethers MTBE and ETBE synthesis

Heteropolyacids (HPA) are polyoxometalates exhibiting high activity in the acid-base type of catalytic reaction. This review paper discusses the role of the primary and secondary structure of solid HPAs in the catalytic synthesis of tertiary ethers, MTBE and ETBE, on H4SiW12O40 and H6P2W18O62 catalysts.