Metalloporphyrins of Oil from the Severnoe Buzachi Oil Field: UV, IR, and EPR Studies

IF 0.7 4区工程技术 Q4 ENGINEERING, CHEMICAL

Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI:10.1134/S0040579523050238

Zh. K. Myltykbaeva, A. V. Anisimov, Zh. T. Eshova, A. B. Seisembekova, M. B. Smaiyl

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Abstract

The spectrophotometric studies of vanadylporphyrin complexes isolated from the oil of the Severnoe Buzachi field with absorption maxima at 534 and 573 nm showed that the dominant compounds were etioporphyrins (ETIOs) and deoxophylloerythro-etioporphyrins (DPEPs), and that extraction with N,N-dimethylformamide allows extraction of vanadylporphyrin complexes from oil without destroying their structure. The ETIO/DPEP ratio of vanadylporphyrins was 1.14–2.17. The IR spectra of the isolated vanadylporphyrin fractions indicated that the content of free porphyrins was extremely low judging by the presence of deformation and out-of-plane vibrations of the NH group in the ranges 3250–3400 and 960–980 cm^–1. This suggests that the extraction method for isolating vanadylporphyrins does not lead to their demetallization. The EPR spectral data confirmed the high concentration and purity of vanadylporphyrin, which correlates well with the UV spectral data and indicates that chromatographic purification and separation of the extract is efficient.

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Severnoe Buzachi 油田石油中的金属卟啉：紫外线、红外线和 EPR 研究

对从 Severnoe Buzachi 油田分离出的最大吸收波长为 534 和 573 nm 的钒基卟啉复合物进行的分光光度法研究表明，主要化合物为乙型卟啉（ETIOs）和脱氧紫外乙型卟啉（DPEPs），用 N,N-二甲基甲酰胺萃取可从油中提取钒基卟啉复合物而不破坏其结构。钒基卟啉的 ETIO/DPEP 比率为 1.14-2.17。分离出的钒卟啉馏分的红外光谱显示，NH 基团在 3250-3400 和 960-980 cm-1 范围内存在变形和平面外振动，由此判断游离卟啉的含量极低。这表明分离钒卟啉的提取方法不会导致其脱金属。EPR 光谱数据证实了钒基卟啉的高浓度和高纯度，这与紫外光谱数据有很好的相关性，表明提取物的色谱纯化和分离是有效的。

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来源期刊

Theoretical Foundations of Chemical Engineering 工程技术-工程：化工

CiteScore

1.20

自引率

25.00%

发文量

审稿时长

24 months

期刊介绍： Theoretical Foundations of Chemical Engineering is a comprehensive journal covering all aspects of theoretical and applied research in chemical engineering, including transport phenomena; surface phenomena; processes of mixture separation; theory and methods of chemical reactor design; combined processes and multifunctional reactors; hydromechanic, thermal, diffusion, and chemical processes and apparatus, membrane processes and reactors; biotechnology; dispersed systems; nanotechnologies; process intensification; information modeling and analysis; energy- and resource-saving processes; environmentally clean processes and technologies.