关键词: 煤直接液化, 加氢稳定油, 加氢, 工业白油

Abstract: Two types of hydrofining catalysts were used to produce industrial white oil from hydrogenated oil of direct coal liquefaction process in a two-stage hydrofining process. The results showed that the reaction temperature, pressure and volume space velocity had a great influence on desulfurization，denitrogenation and aromatics saturation reaction in the first stage of the process. At the conditions of 15 MPa， 380 ℃ and LHSV 0.4 h-1，the mass fractions of sulfur and nitrogen in product oil were 1.6μg /g and 1.5 μg /g, respectively，the desulfurization rate and denitrogenation rate reached 97.72% and 99.81%，respectively. The aromatics content in the product was 31.2% and the aromatics saturation rate was 55.9%. After the deep hydrofining in the second stage，the aromatics content in the product reduced to less than 5%. The products were cut in a true boiling point distillation device. The 280-300 ℃ and 300-320 ℃ distillates obtained can satisfy the No.5, No.7 industrial white oil (Ⅰ) industry standard requirements, respectively.

Key words: direct coal liquefaction, hydrogenated stabilized oil, hydrogenation, industrial white oil