Method for preparing carboxymethylcellulose by using potato residues
A technology for carboxymethyl cellulose and potato dregs is applied in the field of preparing carboxymethyl cellulose from potato dregs, which can solve problems such as inability to handle rationally, potato dregs pollutes the environment, etc., and achieves improved etherification reaction rate, low-cost and easy-to-use instruments. The effect of obtaining and simplifying the preparation process
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Embodiment 1
[0011] Example 1: Measure 50.0 ml of deionized water and add it into a reaction vessel, weigh 10 g of potato residues, and add the potato residues under constant stirring. Weigh 0.83g of sodium hydroxide and dissolve it in 5ml of deionized water. After the exotherm is complete and the sodium hydroxide is completely dissolved, add it to the reaction vessel and soak for 8 hours. Dissolve 2.40g of sodium chloroacetate in 10ml of deionized water, raise the temperature to 70°C, slowly add the above solution under stirring for etherification for 2 hours, dry and crush it to 80 mesh, repeat the above steps three times, and obtain carboxymethyl with a substitution degree of 0.19 Cellulose products;
Embodiment 2
[0012] Example 2: Measure 50.0 ml of deionized water and add it into the reaction vessel, weigh 10 g of potato residues, and add the potato residues under constant stirring. Weigh 1.05g of sodium hydroxide and dissolve it in 5ml of deionized water. After the exotherm is complete and the sodium hydroxide is completely dissolved, add it to the reaction vessel and soak for 8 hours, then raise the temperature to 35°C for 1 hour under constant stirring, and weigh it accurately. Dissolve 2.40g of sodium chloroacetate in 10ml of deionized water, raise the temperature to 70°C, slowly add the above solution under stirring for etherification for 2 hours, dry and crush it to 80 mesh, repeat the above steps three times, and obtain carboxymethyl with a substitution degree of 0.35 Cellulose products;
Embodiment 3
[0013] Example 3: Measure 50.0 ml of deionized water and add it into the reaction vessel, weigh 10 g of potato residues, and add the potato residues under constant stirring. Weigh 1.24g of sodium hydroxide and dissolve it in 5ml of deionized water. After the exotherm is complete and the sodium hydroxide is completely dissolved, add it to the reaction vessel and soak for 8 hours, then raise the temperature to 35°C for 1 hour under constant stirring, and weigh it accurately. Dissolve 2.40g of sodium chloroacetate in 10ml of deionized water, raise the temperature to 70°C, slowly add the above solution to etherify for 2 hours under stirring, dry and crush to 80 mesh, repeat the above steps three times to obtain carboxymethyl with a substitution degree of 0.58 Cellulose products;
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