Modified Y-type molecular sieve, catalytic cracking catalyst comprising the same, their preparation and application thereof

US11130917B2 · kind B2 · utility

Assignees

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

Inventors

• Hao Sha · Beijing, CN
• Lingping Zhou · Beijing, CN
• Shuai Yuan · Chongqing, CN
• Weilin Zhang · Nanhu, CN
• Zhenyu Chen · Beijing, CN
• Mingde Xu · Beijing, CN
• Huiping Tian · Beijing, CN

Key dates

• Filing date: Aug 20, 2019
• Grant date: Sep 28, 2021
• Expiry date: Aug 20, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2235/15
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A modified Y-type molecular sieve has a rare earth content of about 4-11% by weight on the basis of rare earth oxide, a sodium content of no more than about 0.7% by weight on the basis of sodium oxide, a zinc content of about 0.5-5% by weight on the basis of zinc oxide, a phosphorus content of about 0.05-10% by weight on the basis of phosphorus pentoxide, a framework silica-alumina ratio of about 7-14 calculated on the basis of SiO2/Al2O3 molar ratio, a percentage of non-framework aluminum content to the total aluminum content of no more than about 20%, and a percentage of the pore volume of secondary pores having a pore size of 2-100 nm to the total pore volume of about 15-30%. The modified Y-type molecular sieve has a high crystallinity, a structure comprising secondary pores, and a high thermal and hydrothermal stability.