Regeneration method for benzene alkylation solid acid catalyst

US11524282B2 · kind B2 · utility

Assignee

• Inner Mongolia Yitai Coal-based New Materials Research Institute Co., Ltd. · CN

Inventors

• Zhen Qian · 翁根苏木, CN
• Jingwei Wu · 达尔罕壕村, CN
• Juncheng Li · 翁根苏木, CN
• Xiaolong Zhang · 红钢城街道, CN
• Hongcheng Cao · 达尔罕壕村, CN
• Yuan Gao · San Diego, US
• Xueting Wu · Xingsheng, CN

Key dates

• Filing date: Jun 11, 2019
• Grant date: Dec 13, 2022
• Expiry date: Oct 23, 2039

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/584
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A regeneration method for a benzene alkylation solid acid catalyst, comprising: purging the solid acid catalyst in a reactor with a gas; continuously injecting n-hexane at a feed port of the reactor and heating the n-hexane to wash the solid acid catalyst, and discharging the n-hexane entraining benzene alkylation reaction residues from a discharge port of the reactor; and stopping injecting n-hexane, cleaning off a liquid in the reactor by purging with the gas, and cooling the reactor. In the regeneration method of the present disclosure, the regeneration liquid used is n-hexane, which can increase the solubility of the residues in channels and enhance the regeneration effect. Meanwhile, permanent damage to the channel structure of the catalyst caused by carbon burning regeneration can be avoided, thereby prolonging the lifetime of the catalyst.