Distribution of Paraffin Hydrocarbons and Asphaltenes in Acidic Water-Oil Emulsion


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Abstract

Asphaltenes and solid paraffins isolated from various layers of acidic water-oil emulsions obtained by mixing an oilfield emulsion with 15% solutions of hydrochloric and sulfamic acids with or without addition of Fe(III) have been studied by elemental analysis, IR and EPR spectroscopy, gas–liquid chromatography, and calorimetry. In acidic water-oil emulsions, the high-molecular-weight petroleum components have not been found to concentrate at the oil/water interface; however, a change in their composition has been revealed, which is more pronounced in the presence of Fe(III). The formation of diamagnetic complexes of the paramagnetic centers of asphaltenes with Fe(III) has been detected.

About the authors

Yu. M. Ganeeva

Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center,
Russian Academy of Sciences; Institute of Geology and Oil and Gas Technologies, Kazan State University

Author for correspondence.
Email: ganeeva@iopc.ru
Russian Federation, Kazan, Tatarstan; Kazan, Tatarstan

E. E. Barskaya

Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center,
Russian Academy of Sciences; Institute of Geology and Oil and Gas Technologies, Kazan State University

Email: ganeeva@iopc.ru
Russian Federation, Kazan, Tatarstan; Kazan, Tatarstan

E. S. Okhotnikova

Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center,
Russian Academy of Sciences; Institute of Geology and Oil and Gas Technologies, Kazan State University

Email: ganeeva@iopc.ru
Russian Federation, Kazan, Tatarstan; Kazan, Tatarstan

T. N. Yusupova

Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center,
Russian Academy of Sciences; Institute of Geology and Oil and Gas Technologies, Kazan State University

Email: ganeeva@iopc.ru
Russian Federation, Kazan, Tatarstan; Kazan, Tatarstan

L. F. Davletshina

Gubkin Russian State University of Oil and Gas

Email: ganeeva@iopc.ru
Russian Federation, Moscow

I. A. Gus’kova

Almet’evsk State Institute of Petroleum

Email: ganeeva@iopc.ru
Russian Federation, Almet’evsk, Tatarstan, 423450

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