Method for modifying molecular sieve and a catalytic cracking catalyst containing the molecular sieve

US11084024B2 · kind B2 · utility

Assignee

• PetroChina Company Limited · CN

Inventors

• Shuhong Sun · Beijing, CN
• Xiaoliang Huang · Beijing, CN
• Haitao Zhang · Ithaca, US
• Gengzhen Cao · Beijing, CN
• Yunfeng Zheng · Beijing, CN
• Lin Wang · Hockessin, US
• Zhishuang Pan · Beijing, CN
• Zhengguo Tan · Beijing, CN
• Yahong Wang · Beijing, CN
• Jinjun Cai · Beijing, CN
• Hongchang Duan · Beijing, CN
• Xueli Li · Chengdu, CN
• Chengyuan Yuan · Beijing, CN
• Dong Wang · Shanghai, CN

Key dates

• Filing date: Aug 4, 2016
• Grant date: Aug 10, 2021
• Expiry date: Oct 21, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G2300/70
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to a molecular sieve modification method and a catalytic cracking catalyst containing a molecular sieve. The method comprises: mixing a solution containing an ion of a Group MB metal in the periodic table, an organic complexing agent, and/or a dispersant and a precipitation agent, and stirring the same to form a suspension containing a precipitant of a Group IIIB element; and mixing the resulting precipitant and a molecular sieve slurry, stirring the same to obtain a mixed slurry containing the precipitant of the Group MB element and a molecular sieve, and performing spray drying and optional calcination, to obtain a modified molecular sieve. The catalyst comprises, as calculated based on the catalyst mass being 100%, 10-55% of a modified molecular sieve (on a dry basis), 10-80% of clay (on a dry basis), 0-40% of an inorganic oxide (on an oxide basis), and 5-40% of a binding agent (on an oxide basis). The catalyst has good activity stability and heavy metal contamination resistance.