Changes in the Structural Parameters of Resins and Asphaltenes during Oil Dewaxing with Liquefied Gas
M. V. MOZHAYSKAYA, G. S. PEVNEVA, V. G. SURKOV
Institute of Petroleum Chemistry, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
Keywords: асфальтены, смолы, депарафинизация сжиженным газом, asphaltenes, resins, liquefied gas dewaxing
Pages: 263-269
Abstract
Changes in the structural parameters of tar and asphaltene molecules of sediments obtained after oil dewaxing with liquefied petroleum gas at temperatures of 0, -5, -15 and -25 ° C were studied. It is shown that with a decrease in process temperature the amount of precipitate formed in the process increases from 10.9 to 13.4 mass %; deeper dewaxing, complete deasphalting and partial detarring also take place. It was established that a decrease in precipitation temperature from 0 to -25 ° C causes changes in the structural-group characteristics of asphaltene and resin molecules: molecular mass, the number of aromatic and naphthenic cycles, alkyl substituents and structural blocks in the molecule.
DOI: 10.15372/CSD2020229
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