Traditionally, crude oil is called crude oil. Dark brown viscous oily liquid with green fluorescence and special smell. It is a mixture of alkanes, cycloalkanes, aromatic hydrocarbons and olefins.
Extended data:
The main components of crude oil are carbon and hydrogen, accounting for 83 ~ 87% and 1 1 ~ 14% respectively. There are also a small amount of sulfur, oxygen, nitrogen and trace elements such as phosphorus, arsenic, potassium, sodium, calcium, magnesium, nickel, iron and vanadium. Specific gravity 0.78 ~ 0.97, molecular weight 280 ~ 300, freezing point -50 ~ 24℃.
Crude oil products can be divided into six categories: petroleum fuels, petroleum solvents and chemical raw materials, lubricants, paraffin, petroleum asphalt and petroleum coke. Among them, the output of various fuels is the largest, close to 90% of the total output; There are the most varieties of lubricants, and the output accounts for about 5%.
Classification of crude oil
Classification by composition: paraffin-based crude oil, naphthenic base crude oil and intermediate base crude oil;
Classification by sulfur content: ultra-low sulfur crude oil, low sulfur crude oil, sulfur crude oil and high sulfur crude oil;
Classification by specific gravity: light crude oil, medium crude oil and heavy crude oil are divided into three categories.
References:
Baidu encyclopedia-crude oil