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METHOD FOR IMPROVING SELECTIVITY OF AMMOXIDATION AND METHOD FOR PRODUCING UNSATURATED NITRILE USING

2025-06-19 04:042230下载
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PROBLEM TO BE SOLVED : To provide a method for stably producing acrylonitrile or methacrylonitrile for a long period of time by suppressing the reduction of yield with time. SOLUTION : When acrylonitrile or methacrylonitrile is produced by ammoxidation, a catalyst 1 and a catalyst 2 are represented by empirical formula (1) respectively as an oxide catalyst; when the atomic ratio of a G-component of the catalyst 1 is g1 and that of the catalyst 2 is g2, they are expressed by 1
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