Abstract: In response to the demand for adjusting product structure by increasing jet fuel production and reducing diesel output, PetroChina Karamay Petrochemical Co., Ltd. conducted feasibility studies and adaptive modifications on an idle 0.3 Mt/a lubricant base oil hydrodeacidification unit for jet fuel production. Industrial calibration and long-term operational evaluations were subsequently implemented. The calibration results demonstrated that after processing the first side-cut oil from atmospheric-vacuum distillation unit, the refined oil exhibited excellent properties:Saybolt color of +30, total acid number of 0.005 mgKOH/g, thermal oxidation stability breakdown temperature exceeding 340 ℃, and silver strip corrosion rating of 1. All parameters could meet the specifications of National Standard GB 6537—2018 "No. 3 Jet Fuel".The operation results showed stable jet fuel quality and smooth unit performance, offering valuable insights for the revamping and quality-efficiency enhancement of similar facilities.

Key words: hydrofining, jet fuel, lube base oil, process optimization