... 2008 5.Best Service Definition: Wash oil is an important process of coal tar distillation fractions, one of about 6.5- ... , methyl naphthalene, acenaphthene, fluorene, dibenzofurans and other products of raw materials, used to absorb benzene.In addition, for ... the preparation of anti-corrosion oil, production of quinoline, indole, dispersants, water reducing agent. ...