Separation of chitin from shrimp shells enabled by transition metal salt aqueous solution and ionic liquid

doi:10.1016/j.cjche.2022.01.031

Chinese Journal of Chemical Engineering ›› 2023, Vol. 53 ›› Issue (1): 133-141.DOI: 10.1016/j.cjche.2022.01.031

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Separation of chitin from shrimp shells enabled by transition metal salt aqueous solution and ionic liquid

Mi Feng¹, Bin He¹, Xinyan Chen¹, Junli Xu³, Xingmei Lu^3,4,5, Cai Jia³, Jian Sun^1,2

1. Key Laboratory of Molecular Medicine and Biotherapy, Ministry of Industry and Information Technology, School of Life Sciences, Beijing Institute of Technology, Beijing 100081, China;
2. Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China;
3. CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, State Key Laboratory of Biochemical Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
4. School of Chemical and Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
5. Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China

Received:2021-09-18 Revised:2022-01-07 Online:2023-04-08 Published:2023-01-28
Contact: Cai Jia,E-mail:cj@ipe.ac.cn;Jian Sun,E-mail:jiansun@bit.edu.cn
Supported by:
The author would like to acknowledge the financial support of the Startup Foundation of China (3160011181808), the National Natural Scientific Foundation of China (21878292, 81673400), and K. C. Wong Education Foundation (GJTD-2018-04).

Separation of chitin from shrimp shells enabled by transition metal salt aqueous solution and ionic liquid

Mi Feng¹, Bin He¹, Xinyan Chen¹, Junli Xu³, Xingmei Lu^3,4,5, Cai Jia³, Jian Sun^1,2

1. Key Laboratory of Molecular Medicine and Biotherapy, Ministry of Industry and Information Technology, School of Life Sciences, Beijing Institute of Technology, Beijing 100081, China;
2. Key Laboratory of Medical Molecule Science and Pharmaceutics Engineering, Ministry of Industry and Information Technology, Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China;
3. CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems, State Key Laboratory of Biochemical Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
4. School of Chemical and Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
5. Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing 100190, China

通讯作者: Cai Jia,E-mail:cj@ipe.ac.cn;Jian Sun,E-mail:jiansun@bit.edu.cn
基金资助:
The author would like to acknowledge the financial support of the Startup Foundation of China (3160011181808), the National Natural Scientific Foundation of China (21878292, 81673400), and K. C. Wong Education Foundation (GJTD-2018-04).

Abstract

Abstract: Chitin is a widely used important industrial polymer mainly from shrimp shells, but its commercial preparation is under the great challenge of serious pollution due to the requirement of HCl and NaOH. Herein, we demonstrated that high purity chitin can be obtained from waste shrimp shells (WSSs) by cascade separation with transition metal salt aqueous solution and ionic liquid (IL). Firstly, calcium carbonate of WSSs was effectively removed in the metal salt aqueous solution driven by the ion exchange interaction. Subsequently, 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) had bifunctional abilities to remove residual protein and introduced metal salts simultaneously by hydrogen bonding and coordination interactions. The key experimental factors affecting the separation process were systematically studied, including the type of metal salts, temperature, and [Bmim]Cl loading. After sequential treatment with a 20% (mass) NiSO₄ aqueous solution at 130 ℃ and [Bmim]Cl at 150 ℃, the purity of α-chitin can be up to 96.5% (mass) that meets commercial requirements. The use of metal salts with higher coordination ability makes the preparation of chitin no longer depend on the commonly acid-base reaction, which is conducive to the preservation of chitin structure.

Key words: Chitin, Ionic liquids, Transition metal salts, Separation, Sustainability

摘要： Chitin is a widely used important industrial polymer mainly from shrimp shells, but its commercial preparation is under the great challenge of serious pollution due to the requirement of HCl and NaOH. Herein, we demonstrated that high purity chitin can be obtained from waste shrimp shells (WSSs) by cascade separation with transition metal salt aqueous solution and ionic liquid (IL). Firstly, calcium carbonate of WSSs was effectively removed in the metal salt aqueous solution driven by the ion exchange interaction. Subsequently, 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) had bifunctional abilities to remove residual protein and introduced metal salts simultaneously by hydrogen bonding and coordination interactions. The key experimental factors affecting the separation process were systematically studied, including the type of metal salts, temperature, and [Bmim]Cl loading. After sequential treatment with a 20% (mass) NiSO₄ aqueous solution at 130 ℃ and [Bmim]Cl at 150 ℃, the purity of α-chitin can be up to 96.5% (mass) that meets commercial requirements. The use of metal salts with higher coordination ability makes the preparation of chitin no longer depend on the commonly acid-base reaction, which is conducive to the preservation of chitin structure.

关键词: Chitin, Ionic liquids, Transition metal salts, Separation, Sustainability

Mi Feng, Bin He, Xinyan Chen, Junli Xu, Xingmei Lu, Cai Jia, Jian Sun. Separation of chitin from shrimp shells enabled by transition metal salt aqueous solution and ionic liquid[J]. Chinese Journal of Chemical Engineering, 2023, 53(1): 133-141.

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Separation of chitin from shrimp shells enabled by transition metal salt aqueous solution and ionic liquid

Separation of chitin from shrimp shells enabled by transition metal salt aqueous solution and ionic liquid

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