Method to raise the solid content of catalytic cracking catalyst slurry

US7727924B2 · kind B2 · utility

Assignee

• PetroChina Company Limited · CN

Inventors

• Conghua Liu · Beijing, CN
• Zhengguo Tan · Beijing, CN
• Wei Ding · Salt Lake City, US
• Shuqin Zheng · Yueyang, CN
• Xinmei Pang · Beijing, CN
• Shuhong Sun · Beijing, CN
• Dong Wang · Shanghai, CN
• Qiuxia Teng · Beijing, CN
• Tong Lu · Beijing, CN

Key dates

• Filing date: Aug 28, 2007
• Grant date: Jun 1, 2010
• Expiry date: Nov 23, 2027

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2229/42
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for preparing cracking catalyst. The method comprises making catalyst slurry having a homogeneous distribution of molecular sieve slurry, pseudoboehmite, clay, inorganic acid and aluminum-containing binder; and subsequent spray drying. Inorganic acid is added prior to the addition of pseudoboehmite; addition of molecular sieve is added after the addition of inorganic acid; and a phosphatic dispersant is added during preparation. Compared to conventional methods of preparing FCC catalyst slurry, the inventive catalyst slurry viscosity is decreased and the fluidity thereof is improved, while catalyst anti-friction is maintained. The solid content of the FCC catalyst slurry can be increased to about 40% or more. The gel forming time is significantly reduced with increased productivity and decreased catalyst production cost. Meanwhile, the catalyst has high pore volume and improved micro-reactivity. Overall reactivity performance of the catalyst is also improved.