Patent ID: 7273829

Claim:
A supported or bound heteropoly acid compound catalyst comprising: a) an active heteropoly acid compound of the general formula: Mo 12 V a P b Cs c O x where Mo is molybdenum, V is vanadium, P is phosphorus, Cs is cesium, O is oxygen, a is 0.01 to 5.0, b is 0.5 to 3.5, c is 0.01 to 2.0 and x satisfies the valences; b) an inert heteropoly acid compound of the general formula: Mo 12 P b′ M c′ O x′ where Mo is molybdenum, P is phosphorus, M is cesium, potassium, rubidium or sodium, O is oxygen, b′ is 0.5 to 3.5, c′ is greater than 2 and x satisfies the valences; wherein the inert heteropoly acid compound is a support or binder for the active heteropoly acid compound.