From the chemical composition, it can be divided into alkane, cycloalkanes and aromatic hydrocarbons. Usually said Anyang, 120#, solvent solvent oil, is the chain alkane. Aromatic hydrocarbon refers to benzene, toluene, xylene 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.