Molecular sieve having mesopores, preparation method therefor, and application thereof

US11572283B2 · kind B2 · utility

Assignees

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

Inventors

• Yunfei Bi · Beijing, CN
• Guofu Xia · Beijing, CN
• Mingfeng Li · Lo Wu, CN
• Qinghe Yang · Beijing, CN
• Weiguo Huang · Suzhou, CN
• Qingzhou Guo · Beijing, CN
• Wenxiu Fang · Beijing, CN
• Luqiang Wang · Beijing, CN
• Hongbao Li · Lo Wu, CN
• Honghui Li
• Jie Gao · Beijing, CN

Key dates

• Filing date: Oct 26, 2018
• Grant date: Feb 7, 2023
• Expiry date: Dec 23, 2038

Classification

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

Abstract

A molecular sieve has a silica/alumina molar ratio of 100-300, and has a mesopore structure. One closed hysteresis loop appears in the range of P/P0=0.4-0.99 in the low temperature nitrogen gas adsorption-desorption curve, and the starting location of the closed hysteresis loop is in the range of P/P0=0.4-0.7. The catalyst formed from the molecular sieve as a solid acid not only has a good capacity of isomerization to reduce the freezing point, but also can produce a high yield of the product with a lower pour point. The process for preparing the catalyst involves steps including crystallization, filtration, calcination, and hydrothermal treatment.