乙烯–醋酸乙烯酯–乙烯醇三元共聚物的制备及其在原油中的降凝降黏研究
Preparation of Ethylene-vinyl acetate-vinyl Alcohol Copolymer (HEVA) and Its Properties of Pour Point Depression and Viscosity Reduction in Crude Oil
DOI: 10.12677/JOGT.2019.411011, PDF,   
作者: 米远祝, 江 夏, 黄志明, 罗 跃：长江大学化学与环境工程学院，湖北 荆州；周 进：中石油长庆油田分公司第八采油厂，陕西 西安
关键词: 三元共聚物；原油；降凝剂；凝固点；降黏率；Terpolymer； Crude Oil； Pour Point Depressant； Freezing Point； Viscosity Reduction Rate
摘要: 以聚乙烯–醋酸乙烯酯为原料，KOH/异丙酮溶液为水解催化剂，制备了乙烯–醋酸乙烯酯–乙烯醇三元共聚物(HEVA)。利用红外光谱和核磁共振氢谱对水解产物进行了结构表征，探讨了水解产物对易凝原油的降凝降黏性能，并与市售乙烯–醋酸乙烯酯共聚物(EVA)和乙烯–甲基丙烯酸酯共聚物(EM)的降凝降黏效果进行了比较。研究结果表明，HEVA的降凝降黏效果明显优于市售产品。针对凝固点为25℃的原油，HEVA最大降凝幅度为11.5℃，25℃时的降黏率为66.9%，50℃时的降黏率为47.6%。
Abstract: Ethylene-vinyl acetate-vinyl alcohol copolymer (HEVA) was synthesized by using ethylene-vinyl acetate copolymer (EVA) as starting materials, and KOH/isopropyl ketone solution as hydrolysis catalyst. The hydrolysis product was characterized by using combined techniques including IR spectroscopy and 1H-NMR. Pour point depression and viscosity reduction of crude oil were studied. Moreover, some available pour depressants were compared, such as ethylene-vinyl acetate copolymer (EVA) and ethylene-methacrylate copolymer (EM). The result shows that the hydrolysis copolymer is superior to these available pour depressants. When freezing point of the crude oil is 25˚C, the maximum depression amplitude is 11.5˚C. Viscosity reduction rate is 66.9% at 25˚C, and it is 47.6% at 50˚C.
文章引用：米远祝, 江夏, 周进, 黄志明, 罗跃. 乙烯–醋酸乙烯酯–乙烯醇三元共聚物的制备及其在原油中的降凝降黏研究[J]. 石油天然气学报, 2019, 41(1): 56-62. https://doi.org/10.12677/JOGT.2019.411011

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