制药循环水用无磷阻垢剂的阻硫酸钙垢性能研究

Performance of CaSO4 Scale for Phosphorus-Free Scale Inhibitor for Pharmaceutical Cooling Water System

摘要:

本文利用马来酸酐（MA）改性聚丙二醇（PPG）后得到的单体PPGAZMA，再与丙烯酸（AA）、丙烯酰胺（AM）通过水相自由基聚合得到无磷阻垢剂AA-AM-PPGAZMA。将合成的无磷阻垢剂进行静态阻硫酸钙实验，结果表明当m（AA）：m（PPGAZMA）：m（AM）=4:3:1时制得的无磷阻垢剂，阻硫酸钙垢效果最佳，阻垢剂AA-AM-PPGAZMA投加量3mg/L时阻硫酸钙垢效率达到98%，此外还考察了引发剂用量和离子浓度对阻垢剂阻垢效果的影响，引发剂用量为6%时效果最佳；当钙离子和硫酸根离子浓度达到8000mg/L、12000mg/L时，阻硫酸钙垢效率仍然能够达到80%以上。通过扫描电镜观察发现，加入阻垢剂AA-AM-PPGAZMA后硫酸钙垢变得疏松不规整，AA-AM-PPGAZMA阻硫酸钙垢性能优于市售的含磷阻垢剂PBTC和PAPEMP，AA-AM-PPGAZMA加入量为3mg/L时，阻垢率已经达到98%，而PBTC和PAPEMP都未达到85%，AA-AM-PPGAZMA是一种具有工业应用前景的新型阻垢剂。

Abstract:

In this paper, inhibitor PPGAZMA obtained by the modification of PPG with maleic anhydride (MA) was obtained by the free radical polymerization of acrylic acid (AA) and acrylamide (AM) to obtain the phosphorus-free scale inhibitor AA-AM-PPGAZMA. The synthesized phosphorus-free scale inhibitor was subjected to static calcium sulphate test. Can be AA: PPGAZMA: AM = 4: 3: 1 (molar ratio), the effect of calcium sulfate scale effect of the best, at 3ppm resistance to calcium sulfate scale effect of 96%, also investigated the amount of initiator on the scale inhibitor. The effect of different ion concentration on scale inhibitor was investigated. Calcium sulphate scale was test by scanning electron microscopy (SEM). The scale inhibitor AA-AM-PPGAZMA significantly changed the morphology of calcium sulfate scale. AA-AM-PPGAZMA is a new type of scale inhibitor with industrial application prospect.