Method for preparing methacrylic acid and methacrolein

Details Method for preparing methacrylic acid and methacrolein Method for preparing methacrylic acid and methacrolein

C - Chemistry, Metallurgy

07

C

260/568.6, 260/5

C07C 47/22 (2006.01) C07C 51/215 (2006.01) C07C 57/05 (2006.01)

Patent

CA 1316936

54 ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for preparing methacrylic acid and methacrolein in one step which comprises subjecting isobutane to catalytic oxidation in the presence of molecular oxygen in the vapor phase, with a catalyst compris- ing a P and/or As - Mo - V and/or Cu composition containing a heteropoly acid. The catalytic oxida- tion is performed at a temperature of not greater than 350 °C, at which temperature the decomposition of the heteropoly acid is unlikely to occur, prefer- ably at a temperature of not greater than 320 °C. By means of this process, methacrylic acid and meth- acrolein are produced with high productivity and in high yield while maintaining a stable activity of the catalyst for a prolonged period of time.

604830

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