中粘度聚α-烯烃合成基础油Mo-Ni-P/γ-Al2O3加氢催化剂的研究

采用Mo-Ni-P/γ-Al₂O₃加氢催化剂, 对中粘度的聚α-烯烃合成基础油进行加氢精制, 精制前对加氢催化剂进行合理的预硫化。研究了加氢精制的工艺条件, 考察了反应温度、氢压、体积空速和氢油比对聚α-烯烃合成基础油加氢效果的影响, 确定了最佳的加氢精制工艺。结果表明，对于该实验原料和催化剂，采用反应温度280 ℃、氢压6.0 MPa、空速0.5 h^－1和氢油体积比800∶1的工艺条件，加氢效果非常理想, 溴值由1.4 g-Br·(100 g油)^－1降至0.22 g-Br·(100 g油)^－1、残炭由0.105%降至0.012%、硫含量由0.9 μg·g^－1降至0.4 μg·g^－1、比色由2.5降至＜0.5, 聚α-烯烃合成基础油的性能有了较大提高。

Hydrofining of medium viscosity poly-α-olefin lubricating base oil catalyzed by Mo-Ni-P/γ-Al 2O 3

Hydrofining of medium viscosity poly-α-olefin lubricating base oil over Mo-Ni-P/γ-Al₂O₃ was studied. The Mo-N-P/γ-Al₂O₃ catalyst was sulfided before use. Influences of reaction temperature, hydrogen pressure , space velocity and hydrogen/oil ratio were investigated and optimum condition was obtained. The results showed that satisfactory hydrofining was attained under 280 ℃, 6.0 MPa, 0.5 h^－1 and V(hydrogen)∶V(oil) of 800∶1, the effect of the process is satisfactory, with bromine value decreasing from 1.4 g-Br·(100 g)^－1 to 0.22 g-Br·(100 g)^－1, residual carbon from 0.105% to 0.012%, sulfur content from 0.9 μg·g^－1 to 0.4 μg·g^－1 and chroma from 2.5 to ≤0.5. Properties of poly-α-olefin lubricating base oil were greatly improved, too.