Method for preparing a coal-based linear alkylbenzene

US12428358B2 · kind B2 · utility

Assignee

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

Inventors

• Jingwei Wu · 达尔罕壕村, CN
• Yue Zhang · Tianjin, CN
• Zhen Qian · 翁根苏木, CN
• Zhifei Li · 翁根苏木, CN
• Xiaolong Zhang · 红钢城街道, CN
• Xinping Zhang · San Diego, US
• Xiangqiang Shi · 翁根苏木, CN
• Zhengxu Ao · 翁根苏木, CN
• Xuanheng Guo · 翁根苏木, CN
• Juncheng Li · 翁根苏木, CN
• Haiguo Wang · 翁根苏木, CN
• Changyu Ren · 翁根苏木, CN

Key dates

• Filing date: Nov 25, 2022
• Grant date: Sep 30, 2025
• Expiry date: Nov 25, 2042

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2300/1022
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present disclosure provides a method for preparing a coal-based linear alkylbenzene, wherein the coal-based linear alkylbenzene is prepared by an alkylation reaction using a coal-based Fischer-Tropsch synthetic oil and a benzene as reaction raw materials and using a molecular sieve loaded with a strong acid cation exchange resin as a catalyst; the strong acid cation exchange resin has an acid strength ≥0.9 mmol/g [H+]; and the coal-based Fischer-Tropsch synthetic oil comprises a linear olefin with a carbon number range of C9-C13. In the present disclosure, the strong acid cation exchange resin is loaded into pores and onto a surface of the molecular sieve, which has better effect on the selectivity to the alkylbenzene product. The product has a high straight chain ratio, has a high selectivity for 2-position substitution, and may maintain a relatively high olefin conversion rate, thereby significantly increasing the lifetime of the catalyst.