溶剂脱沥青工艺(SDA)副产的脱油硬沥青(DOA)生产高等级道路沥青时需要大量高价格的优良软组分，脱沥青油(DAO)-糠醛萃取工艺可以为沥青调和工艺提供优良软组分，实现DOA的合理增值。本文采用族组分划分法(K uop法)将脱沥青油各温度馏分划分为饱和分、芳香分、胶质和沥青质；然后基于UNIFAC热力学方程对DAO-糠醛萃取体系进行了模拟研究，结果显示：计算值与实验值最大误差小于5%；随着温度的升高，精制油收率增加，饱和分含量增大；随着剂油比(质量比)的增加，精制油收率呈线性增加，组成基本不变；在液-液相平衡操作条件下，随着理论级数增加，精制油收率及组成基本不变；在非平衡操作条件下，精制油收率为30.1%(wt)；升高温度降低了糠醛对芳香分的选择性溶解性能，剂油比不影响糠醛的选择性溶解能力。%A large amount of expensive and high quality soft components are needed when using deoiled asphalt (DOA) from solvent deasphalt processes (SDA) to produce high grade road blending asphalt. Furfural-deasphalted oils (DAO) extraction processes can provide soft component thus increase DOA value. The Kuop method was adopted to describe the four components (saturates, aromatics, resins and asphaltene) in DAO, and a model based on the UNIFAC thermodynamic equation describing liquid–liquid equilibrium in furfural-deasphalted oils was developed to simulate the extraction process. The results show that the maximum error between calculated values and experimental values is less than 5%. Refined oil yields and saturates contents increase with the increase of temperature, and refined oil yields increase linearly with the increase of furfural-DAO mass ratio, while the contents remain unchanged. Under liquid-liquid equilibrium conditions, the yield and content of refined oil remain unchanged with the increase of theoretical stage. However, the yield of refined oil increases to 30.1%(wt) under non-equilibrium conditions. These results indicate that the selective dissolution of aromatics in furfural can be reduced under higher temperatures, but it is not affected by furfural-DAO mass ratios.
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