| 孙 悦,梁 蕾,任铁强，等.新型酸性离子液体[Hmim]HSO4催化合成油酸甲酯[J].中国油脂,2015,40(2):.[SUN Yue,LIANG Lei,REN Tieqiang，etc.Synthesis of oleic acid methyl oleate catalyzed by acidic ionic liquid [Hmim]HSO4[J].China Oils and Fats,2015,40(2):.] |
| 新型酸性离子液体[Hmim]HSO4催化合成油酸甲酯 |
| Synthesis of oleic acid methyl oleate catalyzed by acidic ionic liquid [Hmim]HSO4 |
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| DOI： |
| 中文关键词: 酸性离子液体 催化 酯化反应 油酸甲酯 |
| 英文关键词:acidic ionic liquid catalysis esterification reaction oleic acid methyl oleate |
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| 中文摘要: |
| 以N-甲基咪唑和浓硫酸为原料，制备了一种新型Brφnsted酸性离子液体[Hmim]HSO4，并将其应用到油酸甲酯的合成中。采用红外光谱法分析[Hmim]HSO4的化学结构，然后采用气质联用法对所得油酸甲酯进行定性分析。结果表明，酸性离子液体[Hmim]HSO4催化合成油酸甲酯的优化条件为：酸醇摩尔比1∶4(0.04 mol油酸)、离子液体用量3.5 mL、反应时间6 h，在此条件下，油酸酯化率为92.5%。酸性离子液体[Hmim]HSO4具有较好的催化活性，重复使用9次后，油酸酯化率仍在85%以上，且易与产品分离，克服了传统无机酸催化的缺陷。 |
| 英文摘要: |
| Using N-methylimidazole and concentrated sulfuric acid as raw materials, a noval Brφnsted acidic ionic liquid [Hmim]HSO4 was synthesized and used as catalyst in the esterification reaction of oleic acid and methanol. The chemical structure of [Hmim]HSO4 was characterized by FTIR and the oleic acid methyl oleate was qualitatively analyzed by GC-MS. The results showed that the optimal synthesis conditions of oleic acid methyl oleate catalyzed by ionic liquid [Hmim]HSO4 were obtained as follows: molar ratio of oleic acid to methanol 1∶4 (0.04 mol oleic acid), catalyst dosage 3.5 mL and reaction time 6 h. Under these conditions, the esterification rate of oleic acid reached 92.5%. The esterification rate of oleic acid was still above 85% when ionic liquid [Hmim]HSO4 had been reused for nine times. Therefore, the ionic liquid [Hmim]HSO4showed good catalytic activity and was easily separated from product, which overcame the shortcomings of traditional inorganic acid catalysis. |
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