Fractional distillation involves boiling crude oil so that the various types of hydrocarbon molecules present vaporize, each in turn. The vapors are then condensed into separate batches according to type. More » Science Chemistry

Crude oil is not a uniform liquid but rather a range of liquids with differing amounts of hydrocarbons. It is divided into grades ranging from light, which has a density of around 790 kg/m3, to extra heavy, which has a d... More » Science Chemistry

Crude oil comes with several disadvantages which pose a threat to the environment and also challenge productive use. They include environmental pollution and uncontrolled extraction and depletion. More » Science Environmental Science
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Crude oil is separated into fractions by a technique called fractional distillation. This technique separates the hydrocarbons into fractions by heating the crude oil to about 400 degrees Celsius or 752 degrees Fahrenhei... More » Science Chemistry