通过实验制备了双氰胺缩甲醛聚合物，并用乙二胺对其改性，比较了改性前后其脱色效率的变化，且与常用絮凝剂进行了对比。实验结果表明，双氰胺缩甲醛脱色效果优于常用的无机和有机絮凝剂，改性后具有更快的脱色速率和更宽的投加范围，双氰胺缩甲醛脱色剂在染整废水深度处理中有很大的应用前景。%In this study,the synthesis of dicyandiamide formaldehyde polymer( DCD-HCHO)was prepared in lab,and ethylenediamine was added for modification. Its decolorizing efficiency was studied as compared to the general flocculating agents. Experimental results indicated that dicyandia-mide formaldehyde had better decolorizing efficiency than general organic and inorganic flocculating agents ,and with medication it would be widely used in advanced treatment of dyeing and finishing waste water due to its excellent decoloration effect ,faster decoloration speed and wider range of do-sing.
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