Copolymerized Maleic Anhydride with Acrylamide to Control Calcium Sulfate Scale Formation
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1Department of Petroleum Engineering,Chemistry & Chemical Engineering Research Center of Iran, Tehran, Iran
2Petroleum Engineering Department, Chemistry & Chemical Engineering Research Center of Iran, 14335-186, ‎Tehran, Iran
3Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
Formation of mineral scales like calcium sulfate brings about notable problems such as decreasing equipment life and process efficiency in cooling water systems. To deal with these challenges, a polymeric antiscalant was synthesized through copolymerization of maleic anhydride with water-soluble monomer acrylamide (MAn-AAm). Structure and morphology of the copolymer were characterized by FT-IR, SEM imaging and EDX analyses. Scale inhibiting ability of the MAn-AAm copolymer was studied according to a calcium sulfate precipitation standard test. The observation showed that the dosage of copolymer played an important role on inhibition of scale formation. Furthermore, the copolymer at a concentration of 1 ppm resulted an inhibition of 96% toward the precipitation of calcium sulfate, superior to that of homopolymer with the same backbone.