Modified dicyanodiamide-formaldehyde,a flocculating-decolorizing agent was synthesized by using dicyanodia-mide(DCD)f,ormaldehyde(HCHO)and nitrous acid natrium(NaNO2)catalyzer.

• 以双氰胺和甲醛为主原料,以亚硝酸钠为催化剂,在一定条件下制备改性双氰胺甲醛脱色絮凝剂后不经分离直接处理溴氨酸水溶液。