固体超强酸催化合成2-乙烯基咪唑的研究

摘要

以乙二胺和甲醛水溶液为原料、固体超强酸为催化剂,在固定床下催化合成了2-乙烯基咪唑；并对其合成工艺条件进行了探讨和研究,试验结果表明：反应温度为320℃,乙二胺与40%甲醛水溶液的摩尔比为11.3,进料速度为0.6 mL/min时,2-乙烯基咪唑的转化率最高为10%,催化剂稳定性好,可重复使用。%2-vinyl-imidazole was synthesized from ethylenediamine and formaldehyde catalyzed by solid superacid. The influence of heating temperature, feeding rate, ratio of reactants were examined. The optimal conditions for this reaction were as follows:reaction temperature 320 ℃;feeding rate 0. 7 mL/min, molar ratio of ethylenediamine to 40%formaldehyde 11. 3. The total transformation conversion was up to 10%, and the catalyst was stabilized and reusable.