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| 联产低共熔溶剂的尿素包合法富集不饱和脂肪酸甲酯 |
| Concentration of unsaturated fatty acids methyl ester by urea complexation with a deep eutectic solvent as co-product |
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| DOI： |
| 中文关键词: 尿素包合 不饱和脂肪酸甲酯 低共熔溶剂 解包合方法 |
| 英文关键词:urea complexation unsaturated fatty acids methyl ester deep eutectic solvent uncomplexation method |
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| 中文摘要: |
| 采用尿素包合法富集不饱和脂肪酸甲酯，借助氯化胆碱将尿素-饱和脂肪酸甲酯包合物中的尿素脱除，同时形成低共熔溶剂作为联产产品。新工艺不需要水，生产成本低，绿色环保。在碘值（I）为96 g/100 g、质量为30 g的混合脂肪酸甲酯中，添加尿素20 g、甲醇150 mL，在包合时间3 h、包合温度70℃的条件下，可将脂肪酸甲酯的碘值（I）提高到152 g/100 g。考察了氯化胆碱加量、解包合温度、解包合时间对低共熔溶剂产量和特性的影响。结果表明，解包合温度40℃和解包合时间30 min时，氯化胆碱与包合物中尿素形成的低共熔溶剂与采用分析纯试剂直接合成的低共熔溶剂的性质非常接近。 |
| 英文摘要: |
| Concentration of unsaturated fatty acids methyl ester by urea complexation was studied. The urea in the urea-saturated fatty acids methyl ester inclusion compound was uncomplexed with the help of choline chloride and with deep eutectic solvent as a co-product. There was no need for water in the process. The process had the items of low cost and enviromental protection. Under the conditions of 30 g mixed fatty acid methyl ester of iodine value 96 gI/100 g，urea 20 g，methanol 150 mL，complexation time 3 h and complexation temperature 70℃，the iodine value of the fatty acid methyl ester was up to 152 gI/100 g. The effects of choline chloride dosage，uncomplexation temeprature and uncomplexation time on the yield and property of deep eutectic solvent were investigated. The results indicated that the deep eutectic solvent obtained by choline chloride and urea in the inclusion compound at 40℃ for 30 min exhibited similar properties compared with the deep eutectic solvent obtained by the direct synthesis from analytical reagents. |
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