Amidation of Polyethylene-Acrylic Acid Copolymer as Pour Point Depressants for Waxy Crude Oils
Полиэтилен акрил қышқылының сополимерін парафинді шикі мұнайларға депрессант ретінде қолдану үшін амидациялау
Амидирование сополимера полиэтилен-акриловой кислоты для использования в качестве депрессорных присадок для сырых парафинистых нефтей
Zhubanov A.A. Bondaletov V.G. Kozhabekov S.S. Galymzhan A.Z.
2022E.A.Buketov Karaganda State University Publish House
Bulletin of the Karaganda University Chemistry Series
2022#107Issue 3150 - 157 pp.
The present work aims to provide amine-modified polyethylene-acrylic acid (PEAA) copolymers as a pour point depressant (PPD) that will be evaluated for lower pour point of crude oil. For this, PEAA was amidated with butylamine and octadecylamine in the presence of xylene as a solvent at 150 °C for 10 hours to obtain copolymers PEAA/ODA and PEAA/BA. The copolymers were modified by amidation using the carboxyl groups of an ethylene-acrylic acid copolymer as reaction sites in reactions with RNH2. The resulting copolymers were purified and analyzed by FTIR spectroscopy. The modified PEAA copolymers were evaluated for their effectiveness as depressants for crude oils by pour point measurements at 50 ppm, 100 ppm and 200 ppm and rheological measurements at 100 ppm. The pour point measurements of the crude oil showed that octadecylamine-modified PEAA copolymer performed better than butylamine-modified and unmodified PEAA copolymer. The effectiveness of the modified copolymers compared to unmodified PEAA can be explained by the polarity of the monoalkylamide groups in the peripheral substituents along the copolymer backbone, which plays a crucial role in preventing the agglomeration of wax crystals in crude oil.
copolymers , crude oil , flow , modification , polyethylene-acrylic acid (PEAA) , pour point , pour point depressant (PPD) , primary amines , wax crude oil
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Kazakh-British Technical University, Almaty, Kazakhstan
Tomsk Polytechnic University, Tomsk, Russian Federation
Kazakh-British Technical University, Tole bi, 59, Almaty, 050000, Kazakhstan
National Research Tomsk Polytechnic University, Lenin Ave., 30, Tomsk, 634050, Russian Federation
Kazakh-British Technical University
Tomsk Polytechnic University
Kazakh-British Technical University
National Research Tomsk Polytechnic University
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