Abstract: Considering the status of hydrofining feedstock distribution and the diesel production, the No. 4 diesel hydrofining unit with 3.0 Mt/a capacity of Gaoqiao Co. was revamped to produce the national V compliant diesel fuel. The calibration results at full-load operation (285t/h) after revamping indicated that The calibration results at full capacity (285 t/h) showed that the refined diesel only has sulfur content less than 8μg/g using a feed consisting of 56.14% straight-run diesel, 35.09% coker gasoline and diesel, 8.77% FCC LCO, under the reaction conditions of 6.51 MPa in high pressure separator, LHSV 1.05 h-1, gas to oil volume ratio 540 at the reactor inlet, 315 ℃ inlet temperature of R1101 reactor with average bed temperature 353 ℃, inlet temperature of the 2nd reactor (R1102) 346 ℃, average bed temperature of R1102 348 ℃. The cetane number was raised by 7.7, up to 51.9. Each performance index can reaches the China Ⅴ diesel standard.

Key words: China V diesel, hydrofining, cetane number, sulfur content, revamping