C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/520.7, 260/5
C07C 47/22 (2006.01) B01J 23/28 (2006.01) B01J 23/887 (2006.01) B01J 27/199 (2006.01) C07C 45/65 (2006.01) C07C 51/235 (2006.01) C07C 57/05 (2006.01)
Patent
CA 1125785
ABSTRACT OF THE DISCLOSURE A process for producing methacrolein and methacrylic acid by oxidizing isobutyl aldehyde with colecular oxygen or molecular oxygen- containlng gas in the vapor phase characterized by the use of a catalyst of heteropoly-acid or a mixture of heteropoly-acid and its salt which has the general formula: MoaVbPcXdYeOf wherein Mo, V, P and O represent respectively molybdenum, vanadium, phosphorus and oxygen, X represents one or more elements selected from the group consisting of copper, tin, thorium, aluminuu, germanium, nickel, iron, cobalt, zinc, titsniuo, lead, rhenium, zirconium, cerium, chromium, bismuth and arsenic, Y represents one or more elements selected from the group consisting of potssium, rubidium, cesium and thallium and a, b, c, d, e and f represent the atomic ratio of the elements where, a is 10, b is a number of 6 or less than 6 excluding 0, c is a number of 0.5 to 6, d is a number of 3 or less than 3 excluding 0, e is a number of 0 to 0.8, f is a number determined depending on the valency and atomic ratio of other elements.
344167
Matsumoto Mutsumi
Wada Kouichi
Fetherstonhaugh & Co.
Nippon Kayaku Kabushiki Kaisha
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