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Studies on Synthesis and Inhibiting Performance of Polyaspartic Acid

Yu Haijun

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Abstract

Polyaspartic acid was synthesized with maleic anhydride,ammonia carbonate and sodium hydroxide as raw materials.The results show that a scale inhibition of 95 % can be reached at the polymerization condition of ammonia carbonate to maleic anhydride moalr ratio of 1.1∶1,polymerization temperature of 170 ℃,polymeriation time of 2 h,mass ratio of NaOH to polysuccimide of 0.4∶1,with a dosage of PASP only 2 mg/L.The size of crystal grain of CaCO3 is obviously decreased and crystal form become irregular as polyaspartic acid is added.

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What this paper is about

Polyaspartic acid was synthesized with maleic anhydride,ammonia carbonate and sodium hydroxide as raw materials.The results show that a scale inhibition of 95 % can be reached at the polymerization condition of ammonia carbonate to maleic anhydride moalr ratio of 1.1∶1,polymerization temperature of 170 ℃,polymeriation time of 2 h,mass ratio of NaOH to polysuccimide of 0.4∶1,with a dosage of PASP only 2 mg/L.The size of crystal grain of CaCO3 is obviously decreased and crystal form become irregular as polyaspartic acid is added.

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Available abstract

Polyaspartic acid was synthesized with maleic anhydride,ammonia carbonate and sodium hydroxide as raw materials.The results show that a scale inhibition of 95 % can be reached at the polymerization condition of ammonia carbonate to maleic anhydride moalr ratio of 1.1∶1,polymerization temperature of 170 ℃,polymeriation time of 2 h,mass ratio of NaOH to polysuccimide of 0.4∶1,with a dosage of PASP only 2 mg/L.The size of crystal grain of CaCO3 is obviously decreased and crystal form become irregular as polyaspartic acid is added.

Key concepts: Polyaspartic acid, Maleic anhydride, Polymerization, Ammonia, Chemistry, Sodium hydroxide, Sodium carbonate, Nuclear chemistry

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