| abstract |
At least one compound from the group of unsaturated hydrocarbons of three to four carbon atoms and t-butyl alcohol is oxidized catalytically in the gas phase in the presence of molecular oxygen at 200 DEG -450 DEG C to produce the corresponding aldehyde or acid over a calcined catalyst of the formula MoaSbbBicFedNieSnfXgYhOi wherein X is at least one of potassium, rubidium or cesium, Y is at least one of cobalt, uranium, germanium, tungsten or titanium, a to h are atomic ratios wherein a=12, b=0.2 to 20, c=0.2 to 12, d=0.2 to 12, e=0.2 to 12, f=0 to 20, g=0.01 to 4 and h=0 to 6 and i is a value determined by the oxidation state of the metal atoms in the catalyst.An embodiment of the calcined catalyst of the invention has the formula MoaSbbBicFedNieSnfXgYhZjOi wherein X and y are as defined above and Z is palladium and a to j are atomic ratios wherein a=12, b=0.2 to 20, c=0.2 to 12, d=0.2 to 12, e=0.2 to 12, f=0 to 20, g=0.01 to 4, h=0.01 to 3, j=0.01 to 3 and i assumes a value determined by the oxidation states of the metal atoms in the catalyst. |