Chemistry

Crude oil is a mixture of a variety of liquid hydrocarbons such as alkane, cyclocity, aromatherapy and olefin. 钒 钒 钒 钒.

The wax content refers to the percentage of paraffin and ground wax contained in crude oil under normal temperature and normal pressure. Paraffects are a white or pale yellow solid, which consists of high-grade alkane, and the melting point is 37 ° C -76 ° C. Paraffects are dissolved in oil in the underground, and when the pressure and temperature are reduced, it can be precipitated from oil. The paraffin in the strata crude oil starts to crystallize the temperature of the wax analysis. The higher the wax content, the higher the temperature of the wax analysis.

The temperature of the wax analysis is high, and the oil well is easy to wax, which is not good for oil well management.

The sulfur content refers to the percentage of sulfur (sulfide or single sulfur) contained in crude oil. The sulfur content of crude oil is small, generally less than 1%, but it has a great impact on the nature of crude oil. It has a corrosive effect on pipelines and is harmful to human health. According to different sulfur content, it can be divided into low sulfur or sulfur -containing oil.

The glue content refers to the percentage of glue in crude oil. The glue content of crude oil is generally between 5%-20%. Glipper refers to polygon aromatic hydrocarbon compounds containing oxygen, nitrogen, sulfur and other elements with a large molecular weight (300-1000) in crude oil, which is a semi-solid dispersal dissolving in crude oil. Globe is easily soluble in organic solvents such as petroleum ether, lubricating oil, gasoline, chloroform.

The content of asphalt in crude oil is less, generally less than 1%. Asphalt quality is a black solid substance with a multi -ring structure with a polymer (greater than 1000). It is insoluble in alcohol and petroleum ether, which is easily soluble in benzene, chlorine, and carbonide. When the quality of the asphalt increases, the quality of crude oil is bad.

The hydrocarbon components in crude oil are mainly divided into alkane, cyclumrum, and aromatic hydrocarbons. Depending on the variety of hydrocarbons, paraffin -backed oil, cyclopanane oil and middle cornerstone oil can be divided into three categories. Paradox cornerstone contains more alkanes; cyclocular petroleum contains cyclocccoscan and more aromatic hydrocarbons; middle cornerstone oil is between the two. Most of the crude oils in China are mostly low -sulfur. Crude oil in Daqing and other places belongs to this. Among them, the most representative Daqing crude oil has low sulfur content, high wax content, and high condensation point. It can produce high -quality kerosene, diesel, solvent oil, lubricant and commercial paraffin. Shengli crude oil has high glue content (29%), a large proportion (about 0.91), high wax content (about 15-21%), which is a sulfur-containing intermediate base. Gasoline distillation has good lead -sensitivity, and is rich in cyclumane and aromatic hydrocarbons, so it is a good raw material for reorganization.