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Chitin deacetylation method

A technology for deacetylation and chitin, applied in the field of chitin deacetylation, can solve problems such as huge cost, large amount of waste liquid, and environmental pollution, and achieve the effects of avoiding pollution, fast response, and simple operation

Inactive Publication Date: 2015-12-09
蔡敏郎
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Problems solved by technology

Compared with the microbial method and the enzyme method, although the hot alkali method has the advantages of rapid reaction, less reaction variables, and a high degree of deacetylation, however, this method will produce a large amount of waste liquid, including high-concentration spent alkali liquid and water-washed products. In addition, in addition to the huge cost caused by the use of a large amount of sodium hydroxide, pure water and waste liquid treatment, the hot alkali method is also prone to adverse consequences of polluting the environment

Method used

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Embodiment Construction

[0054] In view of the defects of the prior art, the present invention provides a new method for deacetylation of chitin, which uses high pressure to quickly return to normal pressure, and all the water in the chitin particle structure evaporates in an instant, resulting in Generates a strong vapor pressure and expands rapidly in all directions. During this process, the weaker bonds in the particle structure (such as hydrogen bonds, covalent bonds between acetyl groups and nitrogen atoms) will be broken, and the vapor pressure will be increased by These fractured pores vent.

[0055]In other words, it can be observed in the experiment that the degree of deacetylation of chitin that has been rapidly restored to normal pressure after high pressure is significantly higher than that of chitin that has not been rapidly released (p<0.05). Observation with an electron microscope revealed that after the high pressure was rapidly returned to normal pressure, the chitin particles became ...

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Abstract

The invention discloses a deacetylation method for chitin. According to the method, by instant pressure release under a high-temperature and a high-pressure environment, moisture in chitin particles structure evaporates rapidly to form a huge vapor pressure, thereby causing bond cleavage between chitin acetyl and nitrogen atoms. The method has advantages of large treating amount, quick reaction, few reaction variables, simple operation, low cost and environmental protection.

Description

technical field [0001] The invention relates to a method for deacetylating chitin, in particular to a method for deacetylating chitin by instantaneous pressure release. Background technique [0002] Chitin and chitosan are multifunctional, environmentally friendly, and biocompatible modern materials that can be used in a wide range of applications, such as agriculture, food / nutrition, biomedicine, materials Science, cosmetics, wastewater treatment, papermaking, textiles and other fields, so all countries in the world, whether developed or developing, are actively conducting research on these substances. see figure 1 , which is a schematic diagram of the chemical structural formula of chitin. Chitin is a high molecular polymer composed of N-acetylglucosamine sugar as a monomer and linked by β-1,4. It exists in the exoskeleton of arthropods, squid cartilage and the cell wall of fungi. Although chitin is abundant in nature and has the advantages of stable physical and chemic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/08
Inventor 蔡敏郎陈荣辉江懿展陈健恒
Owner 蔡敏郎
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