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Non-catalytic conversion of chitin into Chromogen I in high-temperature water

Author:
Osada, Mitsumasa, Kobayashi, Hisaya, Miyazawa, Tatsuya, Suenaga, Shin, Ogata, Makoto
Source:
International journal of biological macromolecules 2019 v.136 pp. 994-999
ISSN:
0141-8130
Subject:
chitin, ionic liquids, kinetics, temperature, water solubility, water treatment
Abstract:
The non-catalytic conversion of chitin into N-acetyl-ᴅ-glucosamine (GlcNAc) derivatives such as 2-acetamido-2,3-dideoxy-ᴅ-erythro-hex-2-enofuranose (Chromogen I) was investigated in high-temperature water at 290–390 °C and 25 MPa with a reaction time of 0–180 min. High-temperature water treatment is a promising method for chitin conversion as it does not require the use of any additional organic solvents or ionic liquids. A semi-batch reactor was developed to control the reaction temperature and time. It was found that the chitin powder could be converted into a water-soluble fraction in ~90% yield, with Chromogen I being obtained in a maximum yield of 2.6%. Furthermore, a kinetic model was developed to estimate the reaction rate for the conversion of the chitin powder to the water-soluble fraction.
Agid:
6483426