A kind of starch flocculant and its preparation method and application
A flocculant and starch technology, applied in chemical instruments and methods, flocculation/precipitation water/sewage treatment, other chemical processes, etc., can solve the problems of large power consumption and no energy recovery, so as to protect the environment and reduce secondary pollution , The effect of convenient synthesis method
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Embodiment 1
[0069] A kind of preparation method of starch flocculant, carries out following steps successively:
[0070] (1) Accurately weigh 1.0 g of anionic polyacrylamide (APAM), make it into an aqueous solution with a mass fraction of about 1%, fully dissolve it at room temperature, add 3 mL of formaldehyde solution with a mass fraction of 36.69% to adjust the pH to 7.5, After reacting for 3 hours, a mixture was obtained; by measuring the amount of residual formaldehyde in the mixture, the utilization rate of formaldehyde was calculated and analyzed to be 87.6%.
[0071] (2) Add 0.005 mol of ligand guanine (GUA) to the mixture obtained in step (1), and at 80°C, the pH is 7.0, heated and stirred for 10 hours under the protection of nitrogen, and the stirring speed is 300rpm / min to obtain the polymer ;
[0072] (3) Soak the polymer obtained in step (2) with a mass fraction of 36.69% formaldehyde solution, and then wash it several times with distilled water;
[0073] The washed polymer...
Embodiment 2
[0082] A kind of preparation method of starch flocculant, carries out following steps successively:
[0083] (1) Accurately weigh 1.0 g of anionic polyacrylamide (APAM), make it into an aqueous solution with a mass fraction of about 1%, fully dissolve it at room temperature, add 4 mL of formaldehyde solution with a mass fraction of 36.69% to adjust the pH to 7.5, After reacting for 3 hours, a mixture was obtained; by measuring the amount of residual formaldehyde in the mixture, the utilization rate of formaldehyde was calculated and analyzed to be 85.3%.
[0084] (2) Add 0.005 mol of ligand guanine (GUA) to the mixture obtained in step (1), and at 70°C, the pH is 7.0, heated and stirred for 13 hours under the protection of nitrogen, and the stirring speed is 300rpm / min to obtain the polymer ;
[0085] (3) Soak the polymer obtained in step (2) with a mass fraction of 50% formaldehyde solution, then wash several times with distilled water;
[0086] The washed polymer was put i...
Embodiment 3
[0089] A kind of preparation method of starch flocculant, carries out following steps successively:
[0090] (1) Accurately weigh 1.0 g of anionic polyacrylamide (APAM), make it into an aqueous solution with a mass fraction of about 1%, fully dissolve it at room temperature, add 6 mL of formaldehyde solution with a mass fraction of 36.69% to adjust the pH to 7.5, After reacting for 3 hours, a mixture was obtained; by measuring the amount of residual formaldehyde in the mixture, the utilization rate of formaldehyde was calculated and analyzed to be 84.3%.
[0091] (2) Add 0.005 mol of ligand guanine (GUA) to the mixture obtained in step (1), and at 90°C, the pH is 7.0, heated and stirred for 9 hours under the protection of nitrogen, and the stirring speed is 300rpm / min to obtain the polymer ;
[0092] (3) Soak the polymer obtained in step (2) with a mass fraction of 45% formaldehyde solution, then wash several times with distilled water;
[0093]The above washed polymer was f...
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