Efficient hydrolysis of chitosan in ionic liquids

  • Zhang Z
  • Li C
  • Wang Q
 et al. 
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Abstract

Effective hydrolysis of chitosan, the N-deacetylated product of chitin, remains challenging. Here, we report acid-promoted hydrolysis of chitosan in imidazolium based ionic liquids with good total reducing sugars (TRS) yield under mild conditions. TRS yield reached over 60% in the presence of about 6.0 wt% concentrated hydrochloric acid at 100 °C within 7 h. Kinetic modeling of a typical experimental data set suggested that the hydrolysis most likely followed a consecutive first-order reaction sequence, where k1 and k2, the rate constants for TRS formation and degradation, were determined to be 0.01372 and 0.00015 min-1, respectively. Our method may be useful to explore new applications of natural chitin resources. © 2009 Elsevier Ltd. All rights reserved.

Author-supplied keywords

  • Chitin
  • Chitosan
  • Glucosamine
  • Hydrolysis
  • Ionic liquids

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