Integrated reaction separation device for preparing chitin
A separation device, chitosan oligosaccharide technology, applied in the direction of oligosaccharides, etc., can solve the problems of difficult to obtain active oligosaccharides, consume chemical oxidants, and difficult to obtain specific enzymes, and achieve good economy, extraction purity and efficiency High, easy-to-integrate effects
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Embodiment 1
[0023] In the electrochemical degradation reaction part shown in Fig. 1, Fig. 2 and Fig. 3, the output voltage of the DC power supply 2 is 0-12V, and the current is 0-20A.
[0024] Adopt electrochemical reactor 1 to carry out chitosan degradation reaction, its structural type is as follows Figure 4 As shown, the box-type shell 15 in the figure is made of non-metallic materials, and the electrode plate 16 is composed of 4 artificial graphite plates, with a width of 380mm, a height of 180mm, and an average thickness of 18mm. They are arranged in parallel to form a bipolar three-section series connection. Advanced diaphragmless electrochemical reactor, the average distance between electrodes is 20mm, and the single electrode area is 6.8dm 2 , Effective reaction solution volume 5L.
[0025] The concentration of chitosan input is 10g / L, the concentration of NaCl is 20g / L, the pH value of the solution is 1~3, the reaction temperature is 40~50℃, and the current density is 2~3A / dm 2...
Embodiment 2
[0029] The degradation reaction apparatus used is the same as Example 1.
[0030] The concentration of chitosan input is 20g / L, the concentration of NaCl is 20g / L, the pH value of the solution is 1-3, the reaction temperature is 50-60°C, and the current density is 2-3A / dm 2 .
[0031] Reaction control method is the same as example 1, still taking 90% of viscosity drop as control target.
[0032] Finally, the reaction time was 130min, and the reaction completion liquid was measured, and the generation rate of chitosan oligosaccharide was 84.5%, and the reaction completion liquid was light yellow-green.
Embodiment 3
[0034] The degradation reaction apparatus used is the same as Example 1.
[0035] The concentration of chitosan input is 20g / L, the concentration of NaCl is 20g / L, the pH value of the solution is 1~3, the reaction temperature is 60~70℃, and the current density is 2~3A / dm 2 .
[0036] The reaction control method is the same as Example 1. Still take the viscosity drop of 90% as the control target.
[0037] Finally, the reaction time was 120min, and the reaction completion liquid was measured, and the generation rate of chitosan oligosaccharide was 81.7%, and the reaction completion liquid was light brown. It shows that the side reaction on the surface of the anode increases, and the generation rate of chitosan oligosaccharides decreases.
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