Modified molecular sieve characterized by improved sodium-contamination-resisting activity and preparation method thereof

US8545803B2 · kind B2 · utility

Assignee

• PetroChina Company Limited · CN

Inventors

• Xionghou Gao · Beijing, CN
• Dong Ji · Beijing, CN
• Haitao Zhang · Ithaca, US
• Hongchang Duan · Beijing, CN
• Di Li · Lanzhou, CN
• Zhengguo Tan · Beijing, CN
• Yi Su · Blankenloch, DE
• Chenxi Zhang · Shanghai, CN
• Yi Wang · Lanzhou, CN
• Yanqing Ma · Lanzhou, CN
• Yanbo Sun · Lanzhou, CN

Key dates

• Filing date: Dec 1, 2009
• Grant date: Oct 1, 2013
• Expiry date: Dec 1, 2029

Classification

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

Abstract

Modified molecular sieve characterized by improved sodium-resisting contamination activity and preparation method thereof are provided. The method comprises: adding molecular sieve in phosphorus-containing organic solution, and reacting for 10-200 minutes at temperature of 70-200° C. and pressure of 0.2-1.2 MPa, and then filtering, drying and calcining. The said modified molecular sieve contains 90-99 wt. % molecular sieve as dry basis and 1-10 wt. % phosphorus as oxide. The said method can improve the capability of sodium-resisting contamination effectively, and its technology is simple and fits the existing catalyst production apparatus and process. The said modified molecular sieve has high sodium-resisting contamination activity, and the model catalyst by sodium contamination has high activity retention.