V-Ti-O-Mo催化剂气-固相催化氨氧化合成2-氰基吡啶的研究
首发时间:2016-05-03
摘要:采用混合法制备了含有五氧化二钒(V2O5)、二氧化钛(TiO2)和三氧化钼(MoO3)的三元催化剂,用于连续气固相氨氧化2-甲基吡啶合成2-氰基吡啶。实验结果表明,助催化组分三氧化钼(MoO3)能提高2-氰基吡啶的选择性,当催化剂组成为8.91wt.%V2O5、85.84wt.%TiO2和5.25wt.%MoO3时2-氰基吡啶的选择性最好。基于改进后的V-Ti-O-Mo催化剂,对2-甲基吡啶的氨氧化反应工艺条件进行了优化,当反应温度380℃、物料配比1:5:3.3:22(2-甲基吡啶/氨气/水/空气,摩尔比)、空速0.15 h-1时,2-氰基吡啶收率达到最优值85.6%。
关键词: 2-甲基吡啶 2-氰基吡啶 氨氧化 V-Ti-O-Mo催化剂
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Study on V-Ti-O-Mo catalyst for catalytic ammoxidation to synthesize
Abstract:The catalyst containing V2O5, TiO2 and MoO3 was prepared to be used in continuous gas-solid phase to synthesize 2-cyanopyridine by ammoxidation of 2-picoline. Experimental results show that the co-catalyst MoO3 can improve the selectivity of 2-cyanopyridine, and the best catalyst composition is 8.91wt.%V2O5, 85.84wt.%TiO2 and 5.25wt.%MoO3 to get the best selectivity. Based on improved V-Ti-O-Mo catalyst, the reaction conditions of ammoxidation of 2-cyanopyridine are optimized. When the reaction temperature is 380℃, material ratio is 1: 5: 3.3: 22 (2-methylpyridine / ammonia / water / air, molar ratio) and space velocity is 0.15 h-1, the best yield of 2-cyanopyridine is 85.6%.
Keywords: 2-methylpyridine, 2-cyanopyridine, ammonia oxidation, V-Ti-O-Mo catalyst
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No.4684132114136614****
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V-Ti-O-Mo催化剂气-固相催化氨氧化合成2-氰基吡啶的研究
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