石油炼制与化工 ›› 2025, Vol. 56 ›› Issue (9): 34-41.

• 加工工艺 • 上一篇    下一篇

C8芳烃异构化气、液相组合工艺概算

康承琳,张文,岳欣,盖月庭,周震寰,刘中勋   

  1. 中石化石油化工科学研究院有限公司
  • 收稿日期:2025-02-20 修回日期:2025-03-10 出版日期:2025-09-12 发布日期:2025-08-28
  • 通讯作者: 刘中勋 E-mail:liuzx2.ripp@sinopec.com

GAS-LIQUID BIPHASE C8 AROMATICS ISOMERIZATION TECHNOLOGY AND APPLICATION EVALUATION

  • Received:2025-02-20 Revised:2025-03-10 Online:2025-09-12 Published:2025-08-28

摘要: 在新建和改造芳烃联合装置过程中,基于物料平衡测算结果,对不同工况下C8芳烃在气相异构化单元、液相异构化单元的处理量和对应分离装置的规模进行对比分析。结果表明,使用气、液相异构化并联的工艺流程,解决了液相异构化工艺乙苯转化率低的问题,提高了异构化单元整体的技术经济性。并且,在气、液相异构化组合工艺流程中,通过改变反应温度、压力调节液相异构化催化剂上的芳烃异构化率及气相异构化单元的乙苯转化率,可以调整二甲苯回路中各组分的含量,适应化工品的多样化生产需求。

关键词: 液相, 气相, C8芳烃, 异构化, 并联工艺, 乙苯, 二甲苯

Abstract: The processing capacity of C8 aromatics (mixture of xylene and ethylbenzene) in gas phase isomerization unit and liquid phase isomerization unit and the scale of corresponding separation unit under different working conditions were compared and analyzed by means of material balance method. The results show that the problem of low conversion of ethylbenzene in liquid phase is solved by the parallel process of gas and liquid phase isomerization, and the overall technical economy of isomerization unit is improved. Moreover, in the combined process of gas and liquid phase isomerization, the isomerization rate of liquid phase isomerization catalyst and the conversion of ethylbenzene of gas phase isomerization unit can be adjusted by reaction temperature and pressure, and the content of each component in the xylene circuit can be adjusted to meet the diversified production needs of chemicals.

Key words: liquid phase, gas phase, C8 aromatics, isomerization, parallel process, ethylbenzene, xylene isomer