脱沥青油糠醛萃取过程中液-液相平衡模拟研究  

Simulation of Liquid-Liquid Equilibrium in Furfural-Deasphalted Oil Extraction Processes

作　　者：吴奎 任满年[2] 杜平安[2] 李彬[2] 应卫勇[3] 曹发海[3] 

机构地区：[1]万华化学(宁波)有限公司,浙江宁波315812 [2]中国石化洛阳分公司,河南洛阳471012 [3]华东理工大学化工学院,上海200237

出　　处：《高校化学工程学报》2016年第2期261-267,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：中国石化科研项目(112062)

摘　　要：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(Kuop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.

关 键 词：脱沥青油 糠醛 液液相平衡 族组划分法 萃取 模拟 

分 类 号：TE624[石油与天然气工程—油气加工工程]