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功能化季铵盐离子液体在制备生物柴油中的应用

DOI: 10.11830/ISSN.1000-5013.2011.06.0657

Keywords: 生物柴油, 季铵盐, 离子液体, 功能化, [n-But3N(CH2)3SO3H][p-CH3(C6H4)SO3], 酯交换

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Abstract:

合成6种SO3H-功能化的季铵盐离子液体,红外光谱和核磁共振光谱表征表明,离子液体的结构符合其理论特点.热稳定性分析表明,所合成的离子液体的热稳定性良好,分解温度都在200℃以上.将6种SO3H-功能化的季铵盐离子液体用于三油酸甘油酯与甲醇酯交换制备生物柴油的反应中,比较不同离子液体的催化活性,并以[n-But3N(CH2)3SO3H][p-CH3(C6H4)SO3]作催化剂,考察反应时间、离子液体用量、醇油摩尔比对酯交换反应的影响.结果表明:在反应温度为65℃、醇油比为12∶1,以及离子液体质量分数为7%的条件下反应时间24h,生物柴油产率最高,可达92.04%.

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