Preparation method for anionic dicarboxy cellulose green flocculation material
An anionic and cellulose technology, applied in the field of environmental engineering, can solve the problems of raw material dependence on petroleum resources, difficulty in biodegradation, and low flocculation efficiency, and achieve the effects of increasing aldehyde content, enhancing electronegativity, and requiring less production equipment
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[0024] Example 1:
[0025] 1) Add 1g of reed pulp to the mixed solution of potassium hydroxide and urea that has been precooled at 2°C for 20 minutes. The mass fractions of potassium hydroxide and urea are 5wt% and 10wt%, respectively. The above-mentioned mixed solution of potassium hydroxide and urea and reed The mass ratio of the pulp is 25:1, stir for 4 minutes to make it evenly dispersed, freeze at -10°C for 120 minutes, take out and stir in an ice bath to obtain a uniform and transparent cellulose solution;
[0026] 2) The cellulose solution obtained in step 1) is heated to 50°C under stirring, and the anionizing reagent sodium chloroacetate is added to react for 180 minutes. The mass ratio of sodium chloroacetate to reed pulp is 5:1 to obtain uniform, transparent and water-soluble Good anionic cellulose solution;
[0027] 3) The anionic cellulose solution obtained in step 2) is separated out with ethanol, centrifuged, and the solid is washed to neutrality to obtain anionic ce...
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[0031] Example 2:
[0032] 1) Add 1g of moso bamboo dissolving pulp to the mixed solution of potassium hydroxide and urea that has been pre-cooled at 2°C for 20 minutes. The mass fractions of potassium hydroxide and urea are 5wt% and 10wt%, respectively. The mass ratio of moso bamboo dissolving pulp is 35:1, stir for 4 minutes to make it evenly dispersed, freeze at -10°C for 130 minutes, take it out and stir in an ice bath to obtain a uniform and transparent cellulose solution;
[0033] 2) The cellulose solution obtained in step 1) is heated to 45°C under stirring, and the anionic reagent sodium chloroacetate is added to react for 240 minutes. The mass ratio of sodium chloroacetate to moso bamboo dissolving pulp is 3:1 to obtain a uniform, transparent, water-soluble Good anionic cellulose solution;
[0034] 3) The anionic cellulose solution obtained in step 2) is separated out with ethanol, centrifuged, and the solid is washed to neutrality to obtain anionic cellulose;
[0035] 4) A...
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[0038] Example 3:
[0039] 1) Add 1g of bagasse pulp to the mixed solution of potassium hydroxide and urea that has been pre-cooled at 2°C for 20 minutes. The mass fractions of potassium hydroxide and urea are 5wt% and 10wt% respectively. The above-mentioned mixed solution of potassium hydroxide and urea and bagasse The mass ratio of the pulp is 45:1, stir for 4min to make it evenly dispersed, freeze at -10℃ for 140min, take it out and stir in an ice bath to obtain a uniform and transparent cellulose solution;
[0040] 2) The cellulose solution obtained in step 1) is heated to 55°C under stirring, and the anionic reagent sodium chloroacetate is added to react for 420 minutes. The mass ratio of sodium chloroacetate to bagasse pulp is 8:1 to obtain uniform, transparent and water-soluble Good anionic cellulose solution;
[0041] 3) The anionic cellulose solution obtained in step 2) is separated out with ethanol, centrifuged, and the solid is washed to neutrality to obtain anionic cell...
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