Process for producing p-xylene and ethylbenzene from C8 aromatic containing ethylbenzene

US11845718B2 · kind B2 · utility

Assignees

• CHINA PETROLEUM & CHEMICAL CORPORATION · CN
• RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC · CN

Inventors

• Yanqiang YANG · Beijing, CN
• Dehua Wang · Beijing, CN
• Huiguo Wang · Beijing, CN
• Jianfeng Ma · Beijing, CN
• Hongchao Wang · Yongkang, CN
• Ben Li · Po Tong Ha, CN
• Yusi LIU · Beijing, CN
• Xiaofei QIAO · Shandong, CN
• Ningning GAO · Beijing, CN

Key dates

• Filing date: Sep 28, 2020
• Grant date: Dec 19, 2023
• Expiry date: Sep 28, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2529/80
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for producing para-xylene and ethylbenzene from C8 aromatics containing ethylbenzene includes the steps of sending C8 aromatics containing ethylbenzene to an ethylbenzene liquid-phase adsorption separation device, wherein a suction liquid containing ethylbenzene and a suction residual liquid are obtained after the adsorption separation, and the desorbents in the suction liquid and the suction residual liquid are removed to obtain ethylbenzene and a suction residual oil; sending the suction residual oil to a para-xylene adsorption separation device, and unadsorbed components are discharged as a raffinate from the adsorbent bed; the adsorbent bed is rinsed with a desorbent to desorb the para-xylene therein and obtain an extract; the desorbents in the extract and the raffinate are respectively removed to obtain para-xylene and a raffinate oil; sending the raffinate oil to a xylene isomerization device to carry out xylene isomerization, and the isomerization product is fractionated.