Synthesis and scale inhibitor performance of polyaspartic acid |
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| Authors: | Zhengyan Liu Yonghong Sun Xiaohui Zhou Tao Wu Ying Tian Yingzhan Wang |
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| Institution: | 1. Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, Stavanger, Norway;2. Department of Green Chemistry, National Research Centre, Dokki, Cairo, Egypt |
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| Abstract: | Polyaspartic acid (PASP) has been extensively studied in recent years as a green scale inhibitor. PASP was synthesized by thermal polycondensation of maleic anhydride and ammonium carbonate in this study. The optimal polycondensation reaction conditions were the raw material (maleic anhydride and ammonium carbonate) molar ratio of 1.0:1.2, the polymerization temperature of 180°C and reaction time of 2.0 hr. The results showed that PASP exhibits very good scale inhibiting performance. The inhibition rate was 95% for calcium carbonate and 90% for calcium sulfate by the application of 5 mg/L PASP. |
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