Citation:
MA Xi-Chen, QIN Peng, NIE Xin-Wei, SONG Hui, CAO Ya-Feng. Synthesis of Strong Cationic Amphoteric Flocculant Based on Starch[J]. Chinese Journal of Applied Chemistry,
;2004, 21(12): 1253-1256.
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A new strong cationic amphoteric polymeric flocculant was prepared from a starch-g-polyacrylamide through aminomethylation, sulfonation and quaterization. The effect of the ratio of reagents, temperature, pH and reaction time on the degrees of amination, anion and quaterization were examined. The optimum synthesis conditions were as follows:the mole ratio of n(starch-g-polyacrylamide):n(formaldehyde):n(sodium-bisulfite):n(epoxy chloropropane) equal to 1:1.2:0.7:0.4:0.4, the conditions of sulfomethylation t=65℃, pH=12, time=3.0 h, and the conditions of quaterization t=50℃, pH=11, time=3.5 h. The degrees of amination, anion and quaterization in the product were 5.55 mmol/g, 2.44 mmol/g, and 2.55 mmol/g, respectively.
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Keywords:
- starch,
- cation,
- amphiprotic flocculant
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