Process for separating alkylation product, alkylation reaction and separation process, and related apparatus

US11655423B2 · kind B2 · utility

Assignees

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

Inventors

• Qing Qing Yuan · Beijing, CN
• Junyi Mao · Beijing, CN
• Zhenxing Zhu · Beijing, CN
• Tao Huang · Linglestown, US
• Zhihai Zhao · Beijing, CN
• Yongxiang Li · Zhaoyuan, CN
• Lifeng Hu · Beijing, CN
• Xiaojin Tang · Beijing, CN

Key dates

• Filing date: Sep 6, 2019
• Grant date: May 23, 2023
• Expiry date: Sep 19, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/50
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A process for separating an alkylation product includes introducing a liquid phase alkylation product from an alkylation reaction unit into a first heat-exchanger directly or after being pressurized with a pressure pump and heat-exchanged with a vapor phase stream from the column top of a high-pressure fractionating column, then into a second heat-exchanger and subsequently into the high-pressure fractionating column. The vapor phase stream from the column top of the high-pressure fractionating column is heat-exchanged with the liquid phase alkylation product to be separated, a liquid phase stream from the column bottom of the high-pressure fractionating column is introduced into a low-pressure fractionating column and subjected to fractionation under a condition of 0.2 MPa-1.0 MPa, a low-carbon alkane is obtained from the column top of the low-pressure fractionating column, and a liquid phase stream obtained from the column bottom of the low-pressure fractionating column is an alkylation oil product.