Analysis of Influence Factors for FCC Slurry Separation by Mixed Solvent Extraction

• 作者: Sun Yudong Zhao Xiaoning Liu Ziyuan Feng Yi Han Zhongxiang
• 来源期刊: 中国炼油与石油化工（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: Process Research
• 页码范围: 111-116
• 页数: 6页
• 语种: 英文

摘要

Daqing FCC slurry was treated using mixed solvent containing N,N-dimethylformamide(extraction solvent)and n-paraffin(stripping-agent).The influence of solvent formulation(ratio of DMF/stripping-agent),temperature,time and solvent-oil ratio on yield and aromatics content of the extract oil were analyzed by a four-factor and three-level orthogonal experimental design.The polynomial regression models between the extract oil yield and aromatics content with the four factors were established.Response surface analysis showed that solvent formulation,temperature and solvent-oil ratio have significant effects on extraction result and there is an interaction between temperature and solvent-oil ratio on aromatics content,when the FCC slurry is extracted by mixed solvent.However,the extraction time has no significant effect.The optimal conditions for FCC slurry extraction covered:a solvent mixed ratio of 2.3,a temperature of 62.8℃,a solvent-oil ratio of 3.2,and a time of 35 min.The result of verification experiment was in good agreement with the prediction of the model.