Process for producing methacrylic acid and a catalyst

Details Process for producing methacrylic acid and a catalyst Process for producing methacrylic acid and a catalyst

B - Operations, Transporting

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252/67, 260/521.

B01J 23/84 (2006.01) B01J 23/88 (2006.01) B01J 27/199 (2006.01) C07C 51/25 (2006.01) C07C 57/04 (2006.01)

Patent

CA 1098507

ABSTRACT OF THE DISCLOSURE A catalyst having a heteropoly-acid structure and the general formula: MoaVbPcCUdXe0f wherein Mo, V, P, Cu and 0 represent respectively molybdenum, vanadium, phosphorus, copper and oxygen, X represents one or more elements selected from the group consisting of tin, thorium, germanium, nickel, iron, cobalt, magnesium, zinc, titanium, lead, rhenium, zirconium and chromium, and a, b, c, d, e and f represent the atomic ratio of the elements where, a is 10 b is a number of 3, or less than 3, excluding 0, c is a number of 0.5 to 3, d is a number of 3, or less than 3, excluding 0, e is a number of 3, or less than 3, excluding 0, f is a number representing the number of oxygen atoms needed to complete the hetero polyacid structure, dependent on the values of a, b, c, d, and e, and the valency of the element X. There is also provided a process for producing methacrylic acid by oxidizing methacrolein with molecular oxygen or molecular oxygen-containing gas in the presence of the catalyst defined above.

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