Usually, can be divided into mainly used in the extraction of soy oil, rice, peanut oil and bone oil and other animal and vegetable oil extraction solvent oil, used in rubber, footwear, tires and other fields of rubber solvent oil, paint, paint industry paint solvent oil, and so on.The solvent oil can be divided into three kinds of alkane, cycloalkanes and aromatic hydrocarbons. In fact, except for a few pure hydrocarbon solvents, such as ethane, toluene and xylene, solvent oil is a mixture of various structural hydrocarbons. From the chemical composition, it can be divided into alkane, cycloalkanes and aromatic hydrocarbons. Usually said 6#, 120#, 200# solvent oil, is the chain alkane. Aromatic hydrocarbon refers to benzene, toluene, xylene and so on.