Absorbent oil used to wash benzene or naphthalene compounds from coal gas. It is a fraction of coal tar or petroleum, 230~300°C. Its clear use was not found in the early stage. It is used with coal tar and other compo
nents in petroleum. Similar to the characteristics of compatibility, it is used to wash the gas generated in the fractio
nation process to absorb benzene, naphthalene and other substances in the gas, hence the name washing oil, and it is now mainly used as a term in the coal tar industry.
Generally yellowish brown or brown oily liquid. It is mainly composed of naphthalene compounds, acenaphthene, fluorene, oxyfluorene, phenol, and aza aromatic ring compounds.
