改性氧化钙在催化羟醛缩合反应中的应用评价
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摘要
对氧化钙进行改性并进行催化性能和吸湿率评价。实验结果表明:经溴化苄、溴代苯改性后的氧化钙催化羟醛缩合反应的能力大幅度提高,产率高达90%以上。以溴代苯效果更为显著,10-4用量下改性的氧化钙催化性最好,产率高达98%,并且吸湿率大幅度降低,低于20%。红外分析发现溴代苯改性的氧化钙抗二氧化碳腐蚀能力要强于其他修饰剂,这与该改性氧化钙表现出最佳反应活性结果吻合。
Calcium oxide was modified and its catalytic properties and hygroscopicity were evaluated.The experimental results show that the ability of calcium oxide to catalyze aldol condensation reaction after modification of benzyl bromide and bromobenzene has been greatly improved, and the yield has reached more than 90 %.The effect of brominated benzene is more significant. The modified calcium oxide under 10-4 dosage is the best catalyst,the yield is up to 98%, and the moisture absorption rate is greatly reduced, less than 20%. Infrared analysis showed that the corrosion resistance of calcium oxide modified by brominated benzene was stronger than that of other modifiers, which was in agreement with the results that the modified calcium oxide showed the best reactive activity.
Calcium oxide was modified and its catalytic properties and hygroscopicity were evaluated.The experimental results show that the ability of calcium oxide to catalyze aldol condensation reaction after modification of benzyl bromide and bromobenzene has been greatly improved, and the yield has reached more than 90 %.The effect of brominated benzene is more significant. The modified calcium oxide under 10-4 dosage is the best catalyst,the yield is up to 98%, and the moisture absorption rate is greatly reduced, less than 20%. Infrared analysis showed that the corrosion resistance of calcium oxide modified by brominated benzene was stronger than that of other modifiers, which was in agreement with the results that the modified calcium oxide showed the best reactive activity.
引文
[1]熊继东.Ca O催化糠醛丙酮羟醛缩合反应的研究[J].浙江化工,2017,(12):30-34.
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[4]刘士涛,刘玉环,阮榕生,等.固体碱催化剂生产生物柴油的研究进展[J].现代化工,2013,33(7):30-33.
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[6]常飞琴,张黎,李华锋,等.丙烯酸甲酯改性氧化钙催化制备生物柴油的研究[J].应用化工,2017,(3):532-536.
[7]梁永和,吴芸芸,沈伟英.氧化钙砂表面改性及其抗水化性能研究[J].武汉科技大学学报, 2008, 31(3):247-249.
[8]李冷.氧化钙颗粒表面改性对其水化反应的抑制作用[J].中国粉体技术,2006,21(6):31-33.
[2]汤颖,路勇,于欣.氧化钙在催化Aldol反应中的应用[J].化学世界,2011, 52(12):708-710.
[3]谭露璐,钱君律,伍艳辉.羟醛缩合催化剂的研究进展[J].化学工业与工程,2006,23(1):70-75.
[4]刘士涛,刘玉环,阮榕生,等.固体碱催化剂生产生物柴油的研究进展[J].现代化工,2013,33(7):30-33.
[5]李俊鹏.固体碱催化剂的研究进展[J].广东轻工职业技术学院学报,2007,6(3):13-15.
[6]常飞琴,张黎,李华锋,等.丙烯酸甲酯改性氧化钙催化制备生物柴油的研究[J].应用化工,2017,(3):532-536.
[7]梁永和,吴芸芸,沈伟英.氧化钙砂表面改性及其抗水化性能研究[J].武汉科技大学学报, 2008, 31(3):247-249.
[8]李冷.氧化钙颗粒表面改性对其水化反应的抑制作用[J].中国粉体技术,2006,21(6):31-33.