Niobic acid was applied to catalyze ketol reaction,using the condensation of cyclohexanone with ethylene glycol as probe reaction.A careful study of the effects on the condensation reaction was done,which gave the optimum conditions with 1∶1 5 molar ratio of cyclohexanone to ethylene glycol and the amount of cyclohexane and niobic acid being 28%(volume) and 3 7%(mass) respectively,the reaction was run at reflux for 4h.The overall yield of the product cyclohexanone ethylene ketol was 92 9%.