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功能化离子液体萃取分离甘氨酸
Authors
夏大厦
孟祥展
+3 more
惠岚峰
王慧
许海洋
Publication date
1 January 2019
Publisher
Abstract
以结构和功能可设计的离子液体为萃取剂,通过液–液萃取分离甘氨酸,考察了不同结构的咪唑和季铵离子液体萃取分离甘氨酸的效果,研究了pH值、萃取温度、萃取时间、甘氨酸初始浓度和二环己基-18-冠醚-6(DCH18C6)浓度等工艺参数对甘氨酸分配系数和萃取率的影响,考察了胆碱双三氟甲磺酰亚胺盐(N1112(OH)NTf2)的循环利用性,通过FT-IR和量子化学计算探究了N1112(OH)NTf2和DCH18C6萃取甘氨酸的机理。结果表明,N1112(OH)NTf2的萃取率高于其它离子液体,加入DCH18C6可提高萃取率,N1112(OH)NTf2–DCH18C6复配体系中,甘氨酸萃取率可达85.4%。在最优条件下,分配系数和萃取率分别为10.9和94.4%。离子液体循环利用5次,甘氨酸萃取率仍保持90%。N1112(OH)NTf
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Last time updated on 11/04/2021