Preparation and Evaluation of Modified Ethylene–Vinyl Acetate Copolymer as Pour Point Depressant and Flow Improver for Jianghan Crude Oil,Industrial & Engineering Chemistry Research

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Preparation and Evaluation of Modified Ethylene–Vinyl Acetate Copolymer as Pour Point Depressant and Flow Improver for Jianghan Crude Oil
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2017-09-25 00:00:00 , DOI: 10.1021/acs.iecr.7b02929
Yongwen Ren ₁ , Zhaojun Chen ₁ , Hui Du ₁ , Long Fang ₁ , Xiaodong Zhang ₁

Affiliation

The ethylene–vinyl acetate copolymer (EVA) was modified by alkali-catalyzed alcoholysis. The alcoholized EVA (EVAL) was characterized by Fourier transform infrared (FTIR) spectroscopy and ¹H nuclear magnetic resonance (¹H NMR). Moreover, the influence of modified polar groups of EVA on the crystallization process of wax was investigated through differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The results showed that EVAL had better performance than EVA in reducing the pour point and the viscosity of crude oil. EVAL could change the wax crystal habit and obviously lower the wax precipitation amount of crude oil. In addition, EVAL with stronger polarity could provide greater electrostatic repulsion force to wax crystals compared with EVA, which made the wax crystals have more difficulty to connect together and form a much looser network structure.

中文翻译：

江汉原油改性降凝乙烯和流动改性剂乙烯-乙酸乙烯酯共聚物的制备与评价

乙烯-乙酸乙烯酯共聚物（EVA）通过碱催化的醇解改性。醇化EVA（EVAL）的特征在于傅立叶变换红外（FTIR）光谱和¹ H核磁共振（¹1 H NMR）。此外，通过差示扫描量热法（DSC）和偏振光学显微镜（POM）研究了EVA修饰的极性基团对蜡结晶过程的影响。结果表明，EVAL在降低原油的倾点和粘度方面比EVA具有更好的性能。EVAL可以改变蜡的晶体习性，并明显降低原油的蜡沉淀量。另外，与EVA相比，极性更强的EVAL可以为蜡晶体提供更大的静电排斥力，这使得蜡晶体更难以连接在一起并形成更松散的网络结构。

更新日期：2017-09-26

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