膦酰基阻垢剂PMAAAP的制备及其阻垢性能  

Synthesis of Phosphono Scale Inhibitor( PMAAAP) and Its Scale Inhibition Mechanism

作　　者：张文艺[1] 陈萍[1] 李文昱[1] 邓文[1] 姚立荣[2] 程寒飞[2] 

机构地区：[1]常州大学环境与安全工程学院,江苏常州213164 [2]中冶华天工程技术有限公司,安徽马鞍山243000

出　　处：《精细化工》2015年第7期778-783,共6页Fine Chemicals

基　　金："十二五"国家水体污染控制与治理科技重大专项基金资助项目(2012zx07301-001);江苏省自然科学基金资助项目(BE2012640)~~

摘　　要：以马来酸酐、丙烯酸和次磷酸钠为原料,采用聚合法制备膦酰基阻垢剂-膦基马来酸酐-丙烯酸共聚物（PMAAAP）,考察其在不同的投加量、温度和p H下的阻垢性能。通过XRD分析其钙沉淀物的晶体结构,利用SEM观察其钙沉淀物的形貌特征,通过电导率-t关系曲线揭示了碳酸钙结晶过程。结果表明,当投加量为25mg/L、水温30~45℃、p H=8时,其对碳酸钙的阻垢率达95%以上,对磷酸钙的阻垢率最大为60.87%;XRD显示加入PMAAAP后碳酸钙晶体中方解石结构大量减少,同时出现呈不稳定状态的球霰石晶体结构;SEM显示加入PMAAAP后碳酸钙的形貌呈不规则形状;通过测定溶液中电导率值的变化可知,PMAAAP明显抑制了碳酸钙沉淀的形成。Phosphono scale inhibitor was synthesized through polymerization reaction using maleic anhydride,acrylic acid and sodium hypophosphite as raw materials. The scale inhibition performance of phosphono maleic anhydride acrylic acid polymer（ PMAAAP） under different conditions was investigated. The crystal structure of the calcium precipitation was analyzed by XRD,the morphology features of the calcium precipitation was described by SEM,and the calcium carbonate crystallization process was revealed by conductivity-t dynamic curve. The results show that the maximum calcium carbonate scale inhibition rate is 100% and the maximum calcium phosphate scale inhibition rate is60. 87% under the conditions of dosage of 25 mg / L,p H of 8 and water temperature ranging from 30 ℃to 45 ℃. XRD revealed that the calcite structure in calcium carbonate crystal decreased and the unstable vaterite structure appeared. SEM revealed that the morphology of the calcium carbonate after the addition of PMAAAP is characterized by amorphosity. Determination of the solution conductivity showed that PMAAAP obviously inhibited the formation of calcium carbonate deposits.

关 键 词：阻垢剂 循环冷却水 核磁共振 扫描电镜 水处理技术与环境保护 

分 类 号：TQ085[化学工程]