Phase transitions of petroleum waxes in hydrocarbon solvents of different chemical nature

Phase transitions of petroleum waxes in hydrocarbon solvents of different chemical nature Phase transitions of petroleum waxes and of oil well wax deposits in aliphatic and mixed hydrocarbon solvents were studied by differential scanning calorimetry. n-Undecane and gas condensate were used as aliphatic solvents straightly and as binary and ternary mixtures with cyclohexane and p-xylene. The temperature at which the petroleum and oil well waxes start to crystallize is lower in binary aliphatic–aromatic systems than in aliphatic solvents. The degree of crystallinity of waxes is maximal in aliphatic solvents and minimal in aliphatic–aromatic and aliphatic–naphthene–aromatic systems, which is in agreement with the morphological features of the samples studied. The results obtained led to a conclusion that it is appropriate to use gas condensate compounded with aromatic concentrates for removing wax deposits, in particular, at low stratum temperatures. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Phase transitions of petroleum waxes in hydrocarbon solvents of different chemical nature

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Publisher
Pleiades Publishing
Copyright
Copyright © 2015 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427215080169
Publisher site
See Article on Publisher Site

Abstract

Phase transitions of petroleum waxes and of oil well wax deposits in aliphatic and mixed hydrocarbon solvents were studied by differential scanning calorimetry. n-Undecane and gas condensate were used as aliphatic solvents straightly and as binary and ternary mixtures with cyclohexane and p-xylene. The temperature at which the petroleum and oil well waxes start to crystallize is lower in binary aliphatic–aromatic systems than in aliphatic solvents. The degree of crystallinity of waxes is maximal in aliphatic solvents and minimal in aliphatic–aromatic and aliphatic–naphthene–aromatic systems, which is in agreement with the morphological features of the samples studied. The results obtained led to a conclusion that it is appropriate to use gas condensate compounded with aromatic concentrates for removing wax deposits, in particular, at low stratum temperatures.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Nov 21, 2015

References

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