Abstract
In this study, petroleum acids were extracted from the super-heavy oil of Liaohe oilfield, North-east China, by using acetic acid, and their structural components and properties were investigated by using FT-IR and MS. Moreover, the trace metal contents in the super-heavy oil sample before and after acetic acid treatment were also measured in this work. The results showed that naphthenic acids were the main component of petroleum acids in Liaohe super-heavy oil, and the content of naphthenic acids with double rings was higher than that of other naphthenic acids. It can be concluded that petroleum acids in Liaohe super-heavy oil mainly consist of naphthenic acids, with a carbon number of around 11–69 and containing one to six naphthenic rings and/or one to two aromatic rings, and mainly exists in form of metal salts of petroleum acid. The molecular weight of petroleum acids is in the range of 190–1000.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
Barrow M P, McDonnell L A, Feng X, et al. Determination of the nature of naphthenic acids present in crude oils using nanospray Fourier Transform ion cyclotron resonance mass spectrometry: the continued battle against corrosion. Analytical Chemistry. 2003. 75(4): 860–866
Blum S C, Olmstead N and Bearden R. Thermal decomposition of naphthenic acids. 1998. US Patent: 5820750
Dzidic I, Somerville A C, Raia J C, et al. Determination of naphthenic acids in California crudes and refinery wastewaters by fluoride ion chemical ionization mass spectrometry. Analytical Chemistry. 1988. 60(13): 1318–1323
Fu X Q, Tian S B, Hou S D, et al. Study on the structure and composition of petroleum acids in the Penglai and Sudan high acid crude oil. Chemical Engineering of Oil & Gas. 2007. 36(6): 507–510 (in Chinese)
Gabryelski W and Froese K L. Characterization of naphthenic acids by electrospray ionization high-field asymmetric waveform ion mobility spectrometry mass spectrometry. Analytical Chemistry. 2003. 75(17): 4612–4623
Gaikar V G and Maiti D. Adsorptive recovery of naphthenic acids using ion-exchange resins. Reactive & Functional Polymers. 1996. 31: 155–164
Gallegos E J. Gas chromatography/fast-atom bombardment mass spectrometry of carboxylic acids. Journal of Chromatographic Science. 1987. 25(7): 296–301
Grande K and Sorlie C. Process for removing essentially naphthenic acids from a hydrocarbon oil. 2000. US Patent: 6063266
Hsu C S, Dechert G J, Robbins W K, et al. Naphthenic acids in crude oils characterized by mass spectrometry. Energy & Fuels. 2000. 14(1): 217–223
Huang S K, Tian S B, Liu Z L, et al. Determination of the structure and composition of petroleum acids in the diesel fractions of crude oil with high acid number. Petroleum Processing and Petrochemicals. 2007. 38(4): 51–55 (in Chinese)
Hughey C A, Galasso S A, Zumberge J E. Detailed compositional comparison of acidic NSO compounds in biodegraded reservoir and surface crude oils by negative ion electrospray Fourier transform ion cyclotron resonance mass spectrometry. Fuel. 2007. 86(5–6): 758–768
John W P, Rughani J, Green S A, et al. Analysis and characterization of naphthenic acids by gas chromatography-electron impact mass spectrometry of tert.-butyldimethylsilyl derivatives. Journal of Chromatography A. 1998. 807(2): 241–251
Qian K, Robbins W K, Hughey C A, et al. Resolution and identification of elemental compositions for more than 3000 crude acids in heavy petroleum by negative-ion microelectrospray high-field Fourier transform ion cyclotron resonance mass spectrometry. Energy & Fuels. 2001. 15(6): 1505–1511
Varadaraj R and David W S. Process for neutralization of petroleum acids (LAW810). 2000. US Patent: 6030523
Wu B C, Zhu J H, Wang J, et al. Technique for high-viscosity crude oil demetallization in the Liaohe oil field. Energy & Fuels. 2006. 19(4): 1345–1349
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Wu, B., Zhu, J. Identification of petroleum acids in Liaohe super-heavy oil. Pet. Sci. 6, 433–437 (2009). https://doi.org/10.1007/s12182-009-0066-0
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12182-009-0066-0