Synthesis of n-butyl lactate catalyzed by insoluble heteropoly salt

In this paper tungstosilicic triethanolamine salt and tungstophoric triethanolamine salt were prepared and used as catalysts in the synthesis of n-butyl lactate,The synthetic conditions with tungstosilicic triethanolamine salt as catalyst were also examined.The catalyst was easy to be recovered.and can be reused for more than five times.