Abstract: The capacity of the ketone-benzol dewaxing anddeoiling unit in Henan Oilfield Refinery was enlarged to8×104t/a through technological innovation. The applicationof many mature and reliable technologies, equipment andrnaterials lowered energy consumption by 49% and unitconsumption of mixed solvent by 81％ respectively andincreased wax yield by 4 .5%. Costs lowered and benefitsincreased.