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综述了近年来国内外有关氨氧化 2 -甲基吡嗪合成 2 -氰基吡嗪反应的研究进展 ,讨论了催化剂及各种反应条件对活性的影响 ,分析了反应历程和机理。含钒和含钼氧化物催化剂具有较好的催化活性 ,原料中适量的氧气和氨气有利于反应活性的提高 ,2 -甲基吡嗪转化率和 2 -氰基吡嗪选择性随着温度提高而增加 ,但温度过高使选择性降低 ,一般选取 35 0～ 4 30℃。
The recent progress in the synthesis of 2 - cyanopyrazine in ammoxidation of 2 - methylpyrazine was reviewed. The effects of catalysts and various reaction conditions on the activity were discussed. The reaction mechanism and mechanism were also analyzed. The catalyst containing vanadium and molybdenum oxide has good catalytic activity, and the proper amount of oxygen and ammonia in the raw material is beneficial to the increase of the reaction activity. The conversion of 2 - methylpyrazine and the selectivity of 2 - cyanopyrazine with the increase of temperature Increase and increase, but the temperature is too high to reduce selectivity, the general selection 35 0 ~ 4 30 ℃.