of ammonium metavanadate was suspended in 150 ml of water to the resulting mixture was added 25 gr of oxalic acid dihydrate the resulting mixture was heated to 80 u00b0 c to obtain a blue solution to the resulting solution were added 1 00 gr of titanium tetrachloride and 0 355 gr of cesium chloride the resulting solution was thoroughly stirred to the solution was added 100 gr of electrofused alumina average diameter 3 mm the solution was heated and dried on a water bath to obtain a catalyst carried on the alumina the catalyst was predryed at temperature of 180 u00b0 c for 10 hours a reactor made of stainless steel was filled with the predryed catalyst which was calcined at temperature of 500 u00b0 c for 3 hours while passing air therethrough the atomic ratio of an effective components in the resulting catalyst was v ti cs 100 5 2 the catalytic oxidation was effected by using the above catalyst under the same reaction conditions as in example 1 analysis and separation of the reaction product were effected in the same procedure as in example 1 the procedure of example 1 was repeated except that the catalyst obtained in example 2 and o benzyltoluene as a starting material was used the results are shown in table.