The processing technology of traditional mineral base oil is briefly described.

Mineral base oil usually refers to crude oil (or petroleum) after exploitation and preliminary processing. Mineral oil is a natural mineral buried underground, and unrefined oil after exploration and exploitation is also called crude oil. At room temperature, the finished product of crude oil after refining is called petroleum product. Traditionally, the base oil extracted from petroleum by physical distillation is called mineral oil base oil. The oil refining process is mainly to divide crude oil into different parts to get the required products. The main separation process includes distillation separation of crude oil into crude gasoline, crude kerosene, crude diesel oil, heavy diesel oil, various lubricating oil fractions, cracking feedstock oil and residual oil (also known as residual oil) and separation of various solvents used in lubricating oil purification. The production process is mainly physical and does not change the hydrocarbon structure. The base oil produced depends on the content and properties of ideal components in raw materials. Because the impurities contained in mineral oil can not be completely removed in the refining process, the obtained base oil has a high flow point and is not suitable for operation in cold areas; Therefore, mineral oil base oil is limited in nature.