环保型阻垢剂PESA的相关研究  

Related study on environmental protection type scale inhibitor PESA

作　　者：陈磊[1] 孔秀琴[1] 周昌琴[1] 高萌[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050

出　　处：《应用化工》2016年第10期1824-1827,共4页Applied Chemical Industry

基　　金：国家自然科学基金资助项目(51268034)

摘　　要：采用水浴加热80℃制备PESA-Ca^(2+)螯合物,使用拉曼红外光谱仪分析PESA-Ca^(2+)螯合物和PESA的红外光谱图,确定制备的螯合产物;用草酸钠作指示剂,在不断摇动下用500 mg/L的标准钙溶液滴定测定PESA-Ca^(2+)螯合物的螯合值,结果表明,PESA对水溶液中钙离子的螯合值为135 mg(Ca^(2+))/g PESA,从而推出PESA对水溶液中钙离子的螯合配位比为3.622∶1,即每一个PESA分子将与3.622个钙离子发生配位作用;对PESA-Ca^(2+)螯合物的可生物降解性进行研究,结果表明10 d的生物降解率为12.8%,大于10%,但28 d的生物降解率仅为21.062 5%,说明其为可生物降解物质,但并不是易生物降解物质。Prepared PESA-Ca^2＋chelates with the water bathing 80 ℃,analysis PESA-Ca^2＋chelate and PESA infrared spectrum to determine chelation product prepared by Raman infrared spectroscopy; Measured the chelation value of PESA-Ca^2＋by using the 500 mg / L of standard calcium solution titration with sodium oxalate as an indicator. The results shows that calcium ions in aqueous solution PESA chelation is135 mg（ Ca^2＋） /g PESA,and launch PESA chelating ligand in aqueous solution of calcium ratio of3. 622∶ 1,that is,each molecule will be 3. 622 PESA calcium in coordination role; study on biodegradability of PESA-Ca^2＋,it 10 d biodegradation rate is 12. 8%,greater than 10%,but the 28 d biodegradation rate is 21. 062 5%. It explained that PESA-Ca^2＋is of biodegradable,but not easily biodegradable.

关 键 词：PESA-Ca2+螯合物 螯合值测定 可生物降解性 

分 类 号：TQ9[化学工程]