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    Home > Chemicals Industry > Chemical Technology > The physical properties and preparation methods of chitin resins

    The physical properties and preparation methods of chitin resins

    • Last Update: 2021-11-14
    • Source: Internet
    • Author: User
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    [Physical properties] Chitin, also known as chitin and polyvinylaminoglucose, is a polysaccharide formed by connecting N-acetyl-2-amino-2-deoxy-D-glucose in the form of β-1,4 glycosidic bonds.


    Chitin is non-toxic, odorless, alkali-resistant, heat-resistant, light-resistant, corrosion-resistant, and resistant to insects.


    [Preparation method] In the actual application process of chitin, the chitin needs to be chemically modified to make it a multifunctional series derivative with high application value


    ①N,O-carboxymethyl chitosan is a water-soluble amphoteric compound


    ② Potassium bromide chitin was added to a 5L beaker with 100g of chitin powder and 400mL of 40% NaOH solution to make the chitin powder in suspension


    ③Alkaline chitin/chitosan is added to a 5L beaker with 200g of chitin powder, 800mL of 40% NaOH solution (with additives) placed at a certain temperature for 1h, and kept at -20℃ for 24h, You can get basic chitin


    The preparation method of alkaline chitosan: add chitin to 40% sodium hydroxide solution and maintain it under the action of steam at 100-190℃ for 30-270min, then it can be made


    [application]

    ①Adsorption of metal ions

    Example 1: Chitin adsorbs Cr(VI) ions dissolved in water


    Example 2: Mycelium chitin removes Ni 2+ from water


    ②Treat some wastewater with chitin as a carrier to adsorb metal Ni 2+ to treat cyanide-containing wastewater


    Related Links: Application of Macroporous Adsorption Resin

     

     

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