Preparation and Performance Investigation of Cationic Modified Starch Flocculant
Modified cationic flocculants with high efficiency and low toxicity were prepared from corn starch with acrylamide and 2,3-epoxy-propyl trimethyl ammonium chloride as graf-ted copolymers.Taking grafting rate and grafting efficiency as objective functions,single fac-tor experiment and orthogonal experiment were designed to explore the optimal preparation conditions of the experiment,and then the optimal flocculation environment of the experimen-tal products was explored through kaolin simulated wastewater samples.The experimental results showed that when the dosage of etherifying agent GTA was 0.8 g/L,the dosage of NaOH was 0.1 g,the reaction temperature was 60 ℃,and the reaction time was 3 h,the grafting rate reached 80％and the grafting efficiency reached 81％.In the test of kaolin wastewater simulation water sample,the flocculation effect of the product is the best in the weak alkali environment at 40℃,and the flocculation rate can reach 94％.
NETL
NSTL
万方数据
