The liquid or semi-liquid, high-boiling fraction of residue from the distillation
of petroleum which is used as a fuel. After removal of the lower boiling fraction
of crude oil, sold as petroleum gas, the somewhat higher boiling fraction becomes
gasoline and diesel oil. A portion of the higher boiling fraction is 'cracked
' to yield additional gasoline. Still heavier oils become lubricants. Paraffin
, asphalt, etc., are also extracted from the crude oil. It is the remaining residual
oil, not economically usable for other industrial purposes, which is then sold as
a relatively low cost fuel for burning.
PAC, 1990, 62, 2167
(Glossary of atmospheric chemistry terms (Recommendations 1990))
on page 2211
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook