One-step preparation method for hollow shell type small grain ZSM-5 molecular sieve

US10099931B2 · kind B2 · utility

Assignees

• RESEARCH INSTITUTE OF SHAANXI YANCHANG PETROLEUM (GROUP) CO., LTD. · CN
• Dalian University of Technology · CN

Inventors

• Jiuchang He · Xi'an, CN
• Wei Zhang · Jinan, CN
• Xiongfu Zhang · Xi'an, CN
• Dapeng Li · Shenyang, CN
• Ruimin Gao · Chengdu, CN
• Yongbin Lu · Xi'an, CN
• Shuqin Zhang · Taiyuan, CN
• Mingfeng WANG · Xi'an, CN
• Pengju Huo · Xi'an, CN
• Si-Yu Li · Xi'an, CN
• Yuan Zhang · Wuxi, CN
• Zhiling LIU · Xi'an, CN
• Gang Chen · Walnut, US
• Ting Pei · Xi'an, CN
• Hua Zhang · Hangzhou City, CN

Key dates

• Filing date: Jul 14, 2015
• Grant date: Oct 16, 2018
• Expiry date: Jul 24, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/62
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for directly preparing an empty shell type small grain ZSM-5 molecular sieve. The method comprises: uniformly mixing and stirring an organic template agent, a silicon source and water; dripping an aqueous solution of an aluminum source into the mixture; preserving room temperature, and continuously stirring for a period of time; and performing hydrothermal crystallization, and washing, drying and roasting the obtained product to obtain the molecular sieve. The molecular sieve has high degree of crystallinity and uniform particle size. Moreover, the method requires short time, simple operation and only one step, no extra surfactant is needed, and secondary acid and alkali treatment is not needed.