Aromatization catalyst and preparation process and use thereof

US11305265B2 · kind B2 · utility

Assignees

• Institute of Chemistry Chinese Academy of Sciences · CN
• Shanxi Lu'an Mining (Group) Co., Ltd. · CN

Inventors

• Weibin Fan · Shanxi, CN
• Dezhi Shi · Taiyuan, CN
• Huaqing Zhu · Shanxi, CN
• Mei Dong · Taiyuan, CN
• Jianguo Wang · Horseheads, US
• Zhiwei WU · Taiyuan, CN
• Weiyong Jiao · Shanxi, CN
• Junyi Liu · Beijing, CN
• Dongfei Wang · Beijing, CN
• Jinbo Li · Shanghai, CN
• Yanbin Cui · Changzhi, CN
• Yibo Zhang · Nanhu, CN

Key dates

• Filing date: Aug 14, 2020
• Grant date: Apr 19, 2022
• Expiry date: Aug 14, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/52
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An aromatization catalyst and preparation process and use thereof is set forth. The catalyst comprises an inorganic oxide and a modified Ga-ZSM-5 zeolite, which comprises a modified ZSM-5 zeolite with a hierarchical macro-meso-microporosity and gallium deposited in channels of and/or on surfaces of the modified ZSM-5 zeolite. The hierarchical porosity of the modified ZSM-5 zeolite in the catalyst can reduce diffusion resistance of products during the aromatization reaction, thereby retarding carbon depositing rate and substantially improving catalytic activity, aromatic hydrocarbon selectivity, stability and lifetime of the catalyst. When being used in aromatization of propane, the catalyst exhibits a high stability, a lifetime of more than 320 hours, and a selectivity to aromatic hydrocarbons of up to 73.3 wt. %.