Petroleum history
It was drilled the first oil well in China in the fourth century AD, and the modern history of oil began in Poland in 1853 discovered crude oil distillation processes, and in the US oil industry began to discover Edwin Drake (Edwin Drake's) of oil in 1859 near Pennsylvania
Petroleum components
Petroleum consists of a mixture of a number of hydrocarbons that are different in nature and in their properties. And can not use his state of crude petroleum which is extracted from the ground, but the various components must be separated and purified for the use of each of them in purpose, this process is known as the process of refining. It can not be separated from each hydrocarbon crude oil components separately; because the boiling points of these hydrocarbons are close to a large extent
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