绿色阻垢剂聚天冬氨酸的合成及性能评价

Synthesis and performance evaluation of polyaspartic acid as a green scale inhibitor

采用马来酸酐与氨水进行溶液聚合的方法制备聚天冬氨酸,利用静态阻垢法评价了聚天冬氨酸的阻垢性能。结果表明:聚天冬氨酸的收率能达到90%以上,对Ca2+、HCO3-质量浓度分别为300 mg/L(均以CaCO3计)的水样阻垢率可以达到90%以上,而且有很好的溶限效应。

polyaspartic acid was prepared by the polymerization of maleic anhydride and ammonia solution, and its scale inhibiting performance was evaluated with static scale inhibition method. The results showed that： the yield rate of polyaspartic acid reached more than 90%, the scale inhibiting efficiency of the water sample which the mass concentration of Ca^2＋, HCO3^- were both 300 mg/L（calculated by CaCO3） reached above 90%, and a good critical value effect was also shown.