Study of structural parameters of petroleum acids and analysis of their possible negative impact on the environment

Abstract

Study of the structural parameters of petroleum acids isolated from oil from the Priozernoye field and analysis of their possible negative impact on the environment.The object of the study is and naphthenic acids isolated from the oil of the Priozernoye field. The research was carried out using modern instrumental methods: gas‐liquid chromatography, IR‐spectroscopy, 13C NMR, 1H NMR spectroscopy and elemental analysis.The high degree of oxidation of the oil studied was confirmed. Extraction with dichloromethane and subsequent analysis of the organic extract using IR‐Fourier spectrometry proved that part of the petroleum acids entered the aqueous phase, which poses a serious threat to the biological diversity of this region. The structural parameters of “medium” molecules of petroleum acids isolated by leaching from three distillate fractions of this oil have been established. It is shown that the products isolated during leaching have a molecular weight of 294–574 amu and contain from 20 to 40 carbon atoms, most of which are part of the naphthenic structures. Along with petroleum acids, leaching products include hydrocarbons.Comparison of the structural parameters of the products isolated from the fractions of the studied oil with the data in the scientific literature allows us to qualify the acids contained in the oil of the Priozernoye field as being substances with high toxicity, which requires finding ways to solve the problem of ensuring the environmental safety of this region.

Keywords

• naphthenic acids
• oil oxidation degree
• oil shows
• naphthenic acids structure
• toxicity