학술논문
Phase composition of asphaltenes.
Document Type
Article
Source
Subject
*ASPHALTENE
*PETROLEUM industry
*CALORIMETRY
*AMORPHOUS substances
*TEMPERATURE effect
*POLARIZATION microscopy
*LIQUID crystals
*PRECIPITATION (Chemistry)
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Language
ISSN
1388-6150
Abstract
The phase composition of asphaltenes taken from oils of Romashskino field (Russia) was studied with calorimetry. It was found that in asphaltenes there are ordered amorphous phases which break in the temperature ranges 70-130 and 130-170 °C. Polarization microscopy data show that the liquid crystal phase appears at temperatures from 180 to 190 °C. Moreover, it is shown that in asphaltenes the crystal phases of co-precipitated paraffinic hydrocarbons and salts can be present. [ABSTRACT FROM AUTHOR]