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Neutralization of the Residual Alkaline Solution of Chitosan with CO2 Gas

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Proceedings of the 2012 International Conference on Applied Biotechnology (ICAB 2012)

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 251))

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Abstract

Chitin is converted into chitosan by deacetylation in concentrated sodium hydroxide. Therefore, there is residual lye attached to the surface of chitosan that should be neutralized. In this study, CO2 was used to neutralize the residual alkali under different pressures, instead of washing with water. The results demonstrated that the neutralization of NaOH residue with CO2 for the process of deacetylation of chitin is advantageous over the water-washing method. It only took 1 h to neutralize NaOH under 4 MPa and 100 rpm/min, which saved much time compared with 5 h of the water-washing method. In addition, the consumption of water was one fifth that of water-washing method, thus it could save about 80 % of water. Loss rate of chitosan after neutralization was less than half of washing. On the whole, it reduced the consumption of time, manpower, water resource, and cost. It was easy and simple to handle and facilitated the large-scale production.

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Acknowledgments

This work was supported by program for Changjiang Scholars and Innovative Research Team in University (IRT1166).

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Authors and Affiliations

  1. College of Biotechnology, Tianjin University of Science and Technology, Tianjin, 300457, People’s Republic of China

    Ainan Guo, Shiru Jia, Yujie Dai, Peipei Han, Guojuan Xu, Xintong Zheng & Yanyan Li

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  1. Ainan Guo
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  2. Shiru Jia
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  3. Yujie Dai
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  4. Peipei Han
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  5. Guojuan Xu
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  6. Xintong Zheng
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  7. Yanyan Li
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Corresponding author

Correspondence to Shiru Jia .

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Editors and Affiliations

  1. College of Bioengineering, Tianjin University of Science and Technology, Tianjin, People's Republic of China

    Tong-Cun Zhang

  2. Nanjing University of Technology, Nanjing, People's Republic of China

    Pingkai Ouyang

  3. Department of Microbiology & Molecular Genetics, University of Texas- Houston Medical School, Texas, Texas, USA

    Samuel Kaplan

  4. Wellcome Trust Sanger Institute, Cambridge, United Kingdom

    Bill Skarnes

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Guo, A. et al. (2014). Neutralization of the Residual Alkaline Solution of Chitosan with CO2 Gas. In: Zhang, TC., Ouyang, P., Kaplan, S., Skarnes, B. (eds) Proceedings of the 2012 International Conference on Applied Biotechnology (ICAB 2012). Lecture Notes in Electrical Engineering, vol 251. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37925-3_183

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  • DOI: https://doi.org/10.1007/978-3-642-37925-3_183

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-37924-6

  • Online ISBN: 978-3-642-37925-3

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