Quantum redactiones paginae "Petroleum" differant
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Vocabulum petroleum, id est "oleum [[petra]]e", sc. discernendi causa ab oleo arboreo, primum in libris Anglicis [[saeculum X|saeculi X]] forma ''petraoleum'' reperitur, quod vocabulum Latinum antiquitatis aequae indicare videtur.<ref>[http://www.oed.com/view/Entry/141931 Oxford English Dictionary]], s.v. "petroleum".</ref>
Oleum petrae Graeci antiqui sub nomine ''naphtha'' (graece {{polytonic|''νάφθα''}}) vel ''naphthas'' ({{polytonic|''νάφθας''}}) vel ''[[Medea|Medeae]] oleum''
== Destillatio fractionalis ==
[[Fasciculus:Crude Oil Distillation.png|thumb|250px|right|<!--[[Crude oil]] is separated into fractions by [[fractional distillation]]. The fractions at the top of the [[fractionating column]] have lower [[boiling point]]s than the fractions at the bottom. The heavy bottom fractions are often [[Cracking (chemistry)|cracked]] into lighter, more useful products. All of the fractions are processed further in other refining units.-->'''Oleum crudum''', id est petroleum, potest seiungi per destillationem fractam unde columna frangens obtinetur. Pars summa columnae altiorem [[Punctum ebullitionis|gradus fervidum]] habet partibus inferioribus.]]
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