磷钨杂多酸类离子液体催化环戊烯选择性氧化制备戊二醛
发布时间：2018-10-08 18:24
【摘要】：以H_2O_2为氧化剂,将一系列磷钨杂多酸类离子液体用于催化环戊烯(CPE)选择性氧化制备戊二醛(GA)反应,筛选出催化活性最高的催化剂为[π-C_5H_5NC_(16)H_(33)]_3PW_4O_(16).分别探讨了溶剂种类、用量、催化剂用量、H_2O_2用量、反应温度和反应时间等因素对反应的影响.确定了优化的反应条件:5 mL乙酸乙酯,n(Cat.)∶n(H_2O_2)∶n(CPE)=0.03∶50∶33,35℃,18 h,环戊烯的转化率达100%,戊二醛的选择性达87%.催化剂[π-C_5H_5NC_(16)H_(33)]_3PW_4O_(16)循环使用7次后,戊二醛的选择性仍保持在80%以上.
[Abstract]:Using H_2O_2 as oxidant, a series of phosphotungsten-heteropoly acid ionic liquids were used to catalyze the selective oxidation of cyclopentene (CPE) to glutaraldehyde (GA). The catalyst with the highest catalytic activity was [蟺 -C5H _ 5H _ (5H _ (16) H _ (33)] S _ 3PW4O _ (16). The effects of the kinds of solvents, the amount of catalyst, the amount of H _ 2O _ 2, the reaction temperature and the reaction time on the reaction were discussed. The optimum reaction conditions were determined as follows: 1: 5 mL ethyl acetate, n (Cat.): n (H_2O_2): n (CPE) = 0.03: 50: 33 鈩，
本文编号：2257809
[Abstract]:Using H_2O_2 as oxidant, a series of phosphotungsten-heteropoly acid ionic liquids were used to catalyze the selective oxidation of cyclopentene (CPE) to glutaraldehyde (GA). The catalyst with the highest catalytic activity was [蟺 -C5H _ 5H _ (5H _ (16) H _ (33)] S _ 3PW4O _ (16). The effects of the kinds of solvents, the amount of catalyst, the amount of H _ 2O _ 2, the reaction temperature and the reaction time on the reaction were discussed. The optimum reaction conditions were determined as follows: 1: 5 mL ethyl acetate, n (Cat.): n (H_2O_2): n (CPE) = 0.03: 50: 33 鈩，
本文编号：2257809
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