Synthesis and property study of ter-copolymer P(MA-AMPS-HPA) scale inhibitor
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ORIGINAL PAPER
Synthesis and property study of ter-copolymer P(MA-AMPS-HPA) scale inhibitor Ming Zhou 1,2,3 & Yinhua Gu 2,3 & Rongjun Yi 3 & Hongchang Han 2,3 Received: 16 March 2020 / Accepted: 20 August 2020 # The Polymer Society, Taipei 2020
Abstract The purpose of this study is to construct a scale inhibitor with high efficiency for calcium carbonate scale, calcium sulfate scale and barium sulfate scale. For this purpose, the ter-copolymer P(MA-AMPS-HPA) was synthesized by aqueous solution polymerization method using maleic anhydride (MA), 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and hydroxypropyl acrylate (HPA) as raw materials and ammonium persulfate as initiator. The optimum synthesis conditions of ter-copolymer P(MA-AMPS-HPA) were discussed by single factor method. The relationship between the scale inhibition performance and the molecular weight of ter-copolymer P(MA-AMPS-HPA) was discussed. The structure of ter-copolymer P(MA-AMPS-HPA) was characterized by FTIR. TGA showed that ter-copolymer P(MA-AMPS-HPA) had excellent thermal stability. The scale inhibition mechanism for different scale samples was preliminarily investigated by SEM and EDS analysis. The scale inhibition performance of ter-copolymer P(MA-AMPS-HPA) was evaluated by changing the concentration of ter-copolymer P(MA-AMPSHPA) in aqueous solution, the experimental temperature and pH of the solution. It was found from the tests results that the scale inhibition rate of ter-copolymer P(MA-AMPS-HPA) for calcium carbonate scale, calcium sulfate scale and barium sulfate scale reached 100%, 98% and 72%, respectively. By comparison, the synthesized ter-polymer had better scale inhibition effect than the bicopolymer. Keywords Ter-copolymer P(MA-AMPS-HPA) . Optimum of synthetic condition . Scale inhibition rate . Scale inhibition mechanism
Introduction * Ming Zhou [email protected] Yinhua Gu [email protected] Rongjun Yi [email protected] Hongchang Han [email protected] 1
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan, People’s Republic of China
2
School of Materials Science and Engineering, Southwest Petroleum University, Chengdu, Sichuan, People’s Republic of China
3
Research Centre of Energy Polymer Materials, Southwest Petroleum University, Chengdu, Sichuan, People’s Republic of China
At present, the exploitation of most onshore oil fields has entered the middle and late stages, and the water content in the oil is continuously increasing [1, 2]. The content of Ca2+ Ba2+, SO42−, CO32− and HCO− in oilfield waste water were more than five times that in circulating cooling water, which made it easy to produce a large amount of calcium carbonate, calcium sulfate and barium sulfate scales in oilfield production [3–7]. Scale often exists in underground equipment, pipelines, valves, wellhead and other places [8–10]. Scale easily damaged oil-production equipment and transportation pipeline, seriously affecting the normal production of oil and gas fields [11–13].
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