Modified starch flocculant-phosphate esterification (2)

(2) Starch phosphodiester

The preparation of starch phosphodiester is mainly made by the reaction of starch with phosphorus oxychloride or sodium trimetaphosphate .

① Process of reaction with phosphorus oxychloride 200g (dry basis) potato starch is mixed with 250mL water, the pH value is adjusted to about 11 with sodium hydroxide solution, and 1g sodium chloride is added

②1mol corn starch (180g, moisture content 10%), add to 325mL sodium trimetaphosphate aqueous solution (containing sodium trimetaphosphate 3.

[Application] Phosphate starch can be used not only to treat wastewater from fish processing plants, slaughterhouse wastewater, fermentation plant wastewater, vegetable and fruit soaking water and pulp wastewater, but also as a flocculant for mud

Zhuang Yunlong and others used the phosphate starch flocculant developed in the laboratory to treat waste paper deinking wastewater and industrial wastewater from fine chemical plants.

Phosphate starch can also be used as a settling agent for flotation beneficiation, recovering aluminum in aluminum ore, and settling coal powder in coal washing wastewater from coal mines