Effect of Synthesis Process Parameters of PESA on its Scale-Inhibiting Performance

摘要

Polyepoxy succinic acid (PESA) is a well-established green scale inhibitor. As compared with the testing results of the samples from some relevant domestic companies, it is found that the scale inhibition performance exhibits a significant deviation from batch to batch. Over the course of PESA synthesis, the focus was on the investigation of the effect of the main process parameters such as pH in the synthetic system, temperature and time upon the scale inhibition performance of the resultant product. The findings show that the pH in the synthetic system affects significantly the intermediate yield in the epoxidation step, and that there exists a correlation between the operational temperature and time in the polymerization process. When the 20 ppm sample prepared at the optimized polymerization temperature and time of 90 °C and 2 h, respectively, was dosed in a testing system, the scale inhibition performance at 10 h on stream is invariably no less than 95%.