| 张宁,和芹,刘爽,蔡明建.化学通报,2015,78(3):226-230. |
| 离子液体协同固体酸催化花生壳制备乙酰丙酸的研究 |
| Preparation of Levulinic Acid with Synergistic Catalysis of Ionic Liquid and Solid Acid from Peanut Shells |
| 投稿时间：2014-06-23 修订日期：2014-08-25 |
| DOI： |
| 中文关键词: 离子液体 乙酰丙酸 固体超强酸 花生壳 |
| 英文关键词:ionic liquid, levulinic acid, solid superacid, peanut shells |
| 基金项目:河北省高等学校科学研究计划项目(Z2014066)资助 |
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| 中文摘要: |
| 论文对原料花生壳进行微波预处理,以离子液体1-丁基-3-甲基咪唑氯([Bmim]Cl)为溶剂,以6种S2O82-/MxOy型固体超强酸为催化剂,进行了水解反应制备乙酰丙酸。研究表明S2O82-/ZrO2-Al2O3-SiO2固体酸的催化效果最佳,进一步考察了反应时间、反应温度、固体酸用量、水含量对乙酰丙酸产率的影响。采用响应面法(RSM)建立二次回归模型,得到最佳水解工艺条件：反应时间51min,反应温度160℃,固体酸用量5.1％,此时乙酰丙酸产率可达到78.26%。固体酸重复使用5次后仍保持较高的催化活性。 |
| 英文摘要: |
| Levulinic acid(LA) was prepared via the hydrolysis reaction of peanut shells with microwave pretreatment. Ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) was used as the solvent, and six S2O82-/MxOy solid superacids were used as the catalyst. The results showed that the catalyst property of S2O82-/ZrO2-Al2O3-SiO2 solid acid was best, and further the effects of reaction time, reaction temperature, the amount of solid acid and water on the yield of LA had been investigated. Quadratic regression model was founded and optimization was analyzed with response surface method (RSM). The optimal conditions were as follow: reaction time 51 min, reaction temperature 160℃, and the amount of solid acid 5.1%. Then, the yield of LA could reach 78.26%. Solid acid remained high catalytic activity with reuse after five times. |
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