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化工学报  2015 

新型磺化竹炭材料催化酯化反应

DOI: 10.11949/j.issn.0438-1157.20150804, PP. 3072-3077

Keywords: 磺化竹炭,竹材,催化剂,乙酸丁酯,酯化反应,对甲苯磺酸

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Abstract:

以竹粉为原料、对甲苯磺酸为磺化剂,一锅法制备合成了新型磺化竹炭材料(SBC)。利用元素分析、酸碱反滴定、热重分析(TGA)、X射线光电子能谱(XPS)、X射线衍射(XRD)和傅里叶红外(FTIR)等对所制备的SBC进行了表征。以乙酸和正丁醇的酯化反应为探针反应,评价了SBC的催化作用,考察了催化剂用量、反应温度、酸醇摩尔比等的影响。结果表明,在反应温度为80℃、反应时间4h、SBC用量为正丁醇质量的10%、酸醇摩尔比为3.5:1的适宜条件下,正丁醇转化率达到91.8%,选择性99.5%。SBC重复使用5次,正丁醇转化率仍可达80%以上。此外,SBC催化其他酯化反应体系的实验结果表明,SBC催化活性接近或优于商品离子交换树脂Amberlyst-15。

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