The Improvement of Catalyst of Synthesizing Methacrylic Acid by One-step Oxidation of Isobutylaldchyde

Abstract

Abstract: Vibration frequency of the bridge oxygen of heteropoly molybdophosphoric acid has an obvious impact on the oxygen-insertion reaction. In order to improve its catalytic activity, the substitution of As for Pin the catalyst was tried. The results show that the catalyst with compositions P_1.13As_0.2 · Mo₁₂V_0.25Sb_0.25Cu_0.25K_1.5O_x has a higher catalytic activity and that a better stability last 600 hours ex-perimentally. The yields of methacrylic acid and methacrolein are 71% and 11. 5% in single-pass reaction, respectively, and the conversion of isobutylaldehylde is 100%. Compared with the results obtained before, the yield of methacrylic acid was raised.

Key words: Oxidation of isobutylaldehyde, Heteropoly acid, Methacrylic acid

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Wu Tonghao, Yu Jianfeng, Yang Hongmao, Wang Goujia, Jiang Yuzi, Chi Hongpan, Zhang Xianjun, Sun Jinghui, Zhou Jianping. The Improvement of Catalyst of Synthesizing Methacrylic Acid by One-step Oxidation of Isobutylaldchyde[J]. Chem. J. Chinese Universities, 1990, 11(6): 652.

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The Improvement of Catalyst of Synthesizing Methacrylic Acid by One-step Oxidation of Isobutylaldchyde

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