Catalytic synthesis of 2-iso-propyl-1,3-dioxolane with polyaniline doped with tungstosilicic acid

A new environmentally friendly catalyst,the polyaniline doped with tungstosilicic acid was prepared in the refluxing conditions designed according to orthogonal test method.2-Iso-propyl-1,3-dioxolane was synthesized from iso-butyraldehyde and glycol in the presence of polyaniline doped with tungstosilicic acid.The factors influencing the synthesis were discussed and the best conditions were found out.The optimum conditions are as follows:the mole ratio of glycol to iso-butyraldehyde(r) is 1.5∶1,the catalyst dosage is equal to 1.2% of feedstock,and the reaction time is 1.0 h.The polyaniline doped with tungstosilicic acid is an excellent catalyst for synthesizing 2-iso-propyl-1,3-dioxolane and its yield can reach over 88.8%.