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- W2034856858 abstract "Detailed investigation of solvent-separated fractions of petroleum vacuum residues is necessary for understanding the separation mechanism using different solvents and to prepare better feedstocks for secondary conversion processes. The efficiency of different solvents to remove polars and insolubles from vacuum residues (of two Indian crude oils) has been studied. The solvents used were n-heptane, n-hexane, and n-pentane (non-polar) and ethyl acetate (polar). Soluble fractions were characterized for hydrocarbon group type analysis using high performance liquid chromatography (HPLC), average molecular weights using size exclusion chromatography (SEC), and boiling point distribution using high temperature gas chromatography (HTGC). Method development for HPLC analysis involved the study of parameters such as columns, solvent polarity, detectors, model compounds study, calibration, flow, and solvent gradient programming. The study demonstrated that ultimate soluble fractions have the least content of polar structures of the kind which can cause problems, during cracking and are least prone to cracking. The HPLC, SEC, and simulated distillation (SIMDIS) methods developed and standardized are simple, accurate, and suitable for the rapid assay needed for quick compositional surveys." @default.
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- W2034856858 date "2003-12-01" @default.
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- W2034856858 title "Chromatographic characterization of high-boiling petroleum fractions" @default.
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- W2034856858 doi "https://doi.org/10.1002/jssc.200301506" @default.
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