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

Mi Feng; Bin He; Xinyan Chen; Junli Xu; Xingmei Lu; Cai Jia; Jian Sun

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

Full Length Article | Updated：2026-01-06

- Separation of chitin from shrimp shells enabled by transition metal salt aqueous solution and ionic liquid
- Chinese Journal of Chemical Engineering Vol. 53, Issue 1, Pages: 133-141(2023)
- Affiliations：
  
  1. Key Laboratory of Molecular Medicine and Biotherapy, Ministry of Industry and Information Technology, School of Life Sciences, Beijing Institute of Technology,Beijing,China,100081
  2. 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,China,100190
  3. School of Chemical and Engineering, University of Chinese Academy of Sciences,Beijing,China,100049
  4. Innovation Academy for Green Manufacture, Chinese Academy of Sciences,Beijing,China,100190
  5. 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,China,100081
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2023
- Accepted：
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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.
DOI：

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. DOI：

摘要

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) NiSO

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

whic

h is conducive to the preservation of chitin structure.

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