石油化工2024，Vol.53Issue(7)：981-987,7.DOI:10.3969/j.issn.1000-8144.2024.07.010
全馏分催化汽油抽提降苯工艺研究
Process of benzene reduction via extraction from full-range catalytic gasoline
摘要
Abstract
To address the issue of excessive benzene content in catalytic gasoline under the ChinaⅥgasoline standard,a study was conducted on the benzene reduction process of full-range catalytic gasoline using liquid-liquid extraction.Ethylene glycol(EG)was identified as the optimal extraction solvent after screening 12 solvents.The effects of extraction time,temperature,and solvent ratio on the extraction efficiency were investigated using EG.The results indicate that EG exhibits excellent kinetic performance,achieving liquid-liquid equilibrium with the feedstock within 5 min.Increasing the solvent ratio has little effect on the extraction selectivity but significantly increases the benzene removal efficiency.Raising the temperature also increases benzene removal efficiency but reduces extraction selectivity.In a nine-stage centrifugal extraction experiment with full-range catalytic gasoline,the benzene content is reduced from 1.37%(w)to a maximum of 0.64%(w),achieving a removal efficiency of 64%(φ),while maintaining the yield of other aromatic hydrocarbons above 78%.关键词
催化汽油/降苯/乙二醇/液液萃取Key words
catalytic gasoline/benzene reduction/ethylene glycol/liquid liquid extraction分类
化学化工引用本文复制引用
杨明科,高思亮,唐文成,赵明,田龙胜..全馏分催化汽油抽提降苯工艺研究[J].石油化工,2024,53(7):981-987,7.基金项目
中国石油化工股份有限公司资助项目(421108-1). （421108-1）
