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在连续流动性固定器中,以丙烯醛二甲缩醛、水和氨为原料合成吡啶和3-甲基吡啶.多种重要的影响因素被详细地考察,包括碳源、催化剂、反应温度、液相空速和丙烯醛二甲缩醛/氨/水摩尔比.研究结果表明,与丙烯醛/氨路线相比,丙烯醛二甲缩醛/氨路线能平稳运行,其反应条件对吡啶和3-甲基吡啶总收率产生巨大的影响.最优化的反应条件为:HZSM-5为催化剂、反应温度为450oC、液相空速为0.75 h-1和丙烯醛二甲醛/氨/水物质的量之比为1/3.5/1.在产物中未检测到4-甲基吡啶.
In the continuous flow fixer, pyridine and 3-methylpyridine are synthesized from acrolein dimethyl acetal, water and ammonia, and many important influencing factors are investigated in detail, including carbon source, catalyst, reaction temperature, Liquid airspeed and acrolein dimethyl acetal / ammonia / water molar ratio.The results show that, compared with the acrolein / ammonia route, acrolein dimethyl acetal / ammonia line can run smoothly, the reaction conditions of pyridine and Methylpyridine has a great impact on the total yield.The optimum reaction conditions are as follows: HZSM-5 as catalyst, the reaction temperature is 450oC, the liquid hourly space velocity is 0.75 h-1 and acrolein-formaldehyde / ammonia / water Of the amount of 1 / 3.5 / 1. No 4-picoline was detected in the product.