功能化离子液体萃取分离甘氨酸

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许海洋¹，孟祥展²，夏大厦³，惠岚峰^1*，王慧^2*

1. 天津科技大学造纸学院，天津 3004572. 中国科学院过程工程研究所离子液体清洁过程北京市重点实验室，北京 1001903. 江苏科技大学环境与化学工程学院，江苏镇江 212003

收稿日期:2018-10-11修回日期:2018-11-11出版日期:2019-06-22发布日期:2019-06-20
通讯作者:王慧

基金资助:国家重点研发计划项目;国家自然科学基金委青年科学项目

Extraction of glycine using functional ionic liquids

Haiyang XU¹, Xiangzhan MENG², Dasha XIA³, Lanfeng HUI^1*, Hui WANG^2*

1. College of Papermaking Science and Technology, Tianjin University of Science and Technology, Tianjin 300457, China 2. Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China3. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China

Received:2018-10-11Revised:2018-11-11Online:2019-06-22Published:2019-06-20
Contact:Wang HuiHui

摘要/Abstract

摘要： 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)][NTf2], DCH18C6和甘氨酸之间存在的强氢键作用为萃取分离的关键。因此，[N1112(OH)][NTF2]?DCH18C6可有效萃取分离甘氨酸，为甘氨酸的绿色分离新工艺奠定基础。

引用本文

许海洋孟祥展夏大厦惠岚峰王慧. 功能化离子液体萃取分离甘氨酸[J]. 过程工程学报, 2019, 19(3): 544-552.
Haiyang XU Xiangzhan MENG Dasha XIA Lanfeng HUI Hui WANG. Extraction of glycine using functional ionic liquids[J]. Chin. J. Process Eng., 2019, 19(3): 544-552.

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