Preparation and Properties of MA-AMPS-AM Copolymer Scale Inhibitor for Circulating Water

doi:10.19491/j.issn.1001-9278.2019.02.017

Abstract

Abstract: A maleic anhydride-co-2-acrylamide-2-methylpropanesulfonic acid-co-acrylamide copolymer was synthesized by radical polymerization using maleic anhydride (MAH), 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and acrylamide (AM) as comonomers, and its structure was characterized by Fourier-transform infrared spectroscopy. This copolymer was used as a scale inhibitor for circulating water, and the effects of inhibitor concentration, water temperature and pH value on the inhibiting effect of the inhibition system were investigated. Moreover, the calcium scaling morphology was observed by scanning electron microscopy. The results indicated that this copolymer could act as a good scale inhibitor for CaCO3 and CaSO4 and achieved a scale inhibition rate of 93.8 % for CaCO3 at the concentration of 15 mg/L and 92.8 % for CaSO4 at the concentration of 18 mg/L. In addition, this copolymer exhibited high inhibition efficiency at a water temperature of 80 ℃, and it could destroy the regularity of calcium scale crystals, thus resulting in a large number of defects in the calcium scale crystals and giving a scale-inhibiting effect.

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