三聚氰胺-双氰胺-甲醛三元缩聚物的合成及应用  

Synthesis and Application of Melamine-Dicyandiamide-Formaldehyde Ternary Polycondensate

作　　者：李平 鲁俊良 杨鸿燕 张恒 LI Ping;LU Junliang;YANG Hongyan;ZHANG Heng(College of Marine Science and Biological Engineering,Qingdao University of Science & Technology,Qingdao Shandong 266042;Jiangsu Key Laboratory for Biomass Energy and Material,Nanjing Jiangsu 210042;Shandong Provincial Key Laboratory of Biochemical Engineering,Qingdao Shandong 266042)

机构地区：[1]青岛科技大学海洋科学与生物工程学院,山东青岛266042 [2]江苏省生物质能源与材料重点实验室,江苏南京210042 [3]山东省生物化学工程重点实验室,山东青岛266042

出　　处：《首都师范大学学报（自然科学版）》2019年第3期33-37,共5页Journal of Capital Normal University：Natural Science Edition

基　　金：山东省自然科学基金(ZR2017MC032);江苏省生物质能源与材料重点实验室开放基金(JSBEM201808);青岛科技大学2016年大学生创新创业训练计划(201601008)

摘　　要：在温度65℃下,反应2 h,合成三聚氰胺-双氰胺-甲醛三元阳离子缩聚物高效絮凝脱色剂,再通过添加甲醇和尿素降低游离甲醛含量,得到物质的量的比为三聚氰胺∶双氰胺∶氯化铵∶甲醛∶甲醇∶尿素=1∶3∶2∶15∶2.5∶0.1的高效低游离甲醛絮凝脱色剂,游离甲醛含量降低到1.51 mg/L.在处理模拟废水时,最佳脱色剂用量的质量分数为0.28%,NaOH用量的质量分数为0.26%,脱色时间20 min,pH 8,脱色率达到99.91%.Melamine-dicyandiamide-formaldehyde ternary cationic terploycondensate was synthesized at the temperature of 65℃for 2 h,which was an effective flocculating decoloring agent.It was shown that reducing the content of free formaldehyde by adding methanol and urea to obtain the high-efficiency low free formaldehyde flocculation decolorizer,which in the ratio of the mass of each substance melamine∶dicyandiamide∶ammonium chloride∶formaldehyde∶methanol∶urea=1∶3∶2∶15∶2.5∶0.1.The free formaldehyde content of flocculation decolorizer was reduced to 1.51 mg/L.When processing simulated wastewater,the mass fraction of the optimum decolorizer dosage and the NaOH dosage were 0.28%and 0.26%respectively.The decolorizing time was 20 min,pH 8 and the decolorization rate was 99.91%.

关 键 词：絮凝 脱色剂 缩聚物 废水处理 

分 类 号：TQ319[化学工程—高聚物工业]