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工程科学与技术:2013,45(2):136-141
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改性WO3/ZrO2固体超强酸催化合成乙酰水杨酸
(1.扬州大学 化学化工学院;2.南京工业大学 化学化工学院)
Synthesis of Acetyl Salicylic Acid over Modified Solid Superacid WO3/ZrO2 Catalyst
(1.College of Chem. and Chemical Eng.,Yangzhou Univ.;2.College of Chem. and Chemical Eng.,Nanjing Univ.of Technol.)
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投稿时间:2012-08-24    修订日期:2012-10-29
中文摘要: 采用共沉淀法制备WO3/ZrO2及Ce、Mn改性WO3/ZrO2固体超强酸,通过XRD、Raman等方法对改性前后催化剂进行表征,并将其分别用于乙酰水杨酸合成反应考察催化性能,结果表明Ce改性WO3/ZrO2固体超强酸催化效果最好。以Ce改性WO3/ZrO2固体超强酸作为催化剂对乙酰水杨酸合成工艺进行优化,考察反应时间、反应温度、反应物配比及催化剂用量对酰化反应的影响。最佳反应条件下乙酰水杨酸收率达94.69%,且催化剂回收容易,重复使用多次仍具有较高活性。
Abstract:WO3/ZrO2 and Ce,Mn-modified WO3/ZrO2 solid superacids were respectively prepared by co-precipitation method. The as-prepared catalysts were characterized by means of XRD and Raman. The catalytic performance of the catalysts for synthetizing acetyl salicylic acid was investigated. Ce-modified catalyst showed the highest catalytic activity. Thus Ce-modified solid superacid was used as the catalyst to optimize the synthetizing technology of acetyl salicylic acid. The effects of reaction time,reaction temperature,molar ratio of reactants,as well as dosage of catalyst on synthesis of acetyl salicylic acid were investigated. The yield of acetylsalicylic acid of 94.69% was obtained under optimum reaction conditions. The catalyst is easily recovered and reused with a consistent high activity.
文章编号:201200626     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(21106125)
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张存,吴过,潘小玉,郁美净,金亮,刘晓勤.改性WO3/ZrO2固体超强酸催化合成乙酰水杨酸[J].工程科学与技术,2013,45(2):136-141.
Zhang Cun,Wu Guo,Pan Xiaoyu,Yu Meijing,Jin Liang,Liu Xiaoqin.Synthesis of Acetyl Salicylic Acid over Modified Solid Superacid WO3/ZrO2 Catalyst[J].Advanced Engineering Sciences,2013,45(2):136-141.