煤直接液化加氢稳定油加氢生产工业白油研究

以煤直接液化加氢稳定油为原料，采用两种型号的加氢精制催化剂匹配进行两段加氢精制生产工业白油的试验研究。结果表明：在一段加氢精制反应过程中，反应温度、反应压力和体积空速的变化对脱硫、脱氮和芳烃饱和反应有较大的影响，在反应压力为15 MPa、反应温度为380 ℃、体积空速为0.4 h-1的工艺条件下，产品油中的硫、氮质量分数分别为1.6 μg/g和1.5 μg/g，脱硫率和脱氮率分别达到97.72%和99.81%，此时产品中的芳烃质量分数为31.2%，芳烃饱和率为55.9%；二段深度加氢精制后，产品油中的芳烃质量分数可以降低到5%以下；最终的加氢产品油在实沸点蒸馏装置上切割后，得到的280～300 ℃、300～320 ℃馏分油能分别满足5号、7号工业白油（Ⅰ）的行业标准要求。

STUDY ON PRODUCTION OF INDUSTRIAL WHITE OIL FROM HYDROGENATED OIL OF DIRECT COAL LIQUEFACTION

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.