Method for preparing Y type molecular sieve having high silica to alumina ratio

US10252917B2 · kind B2 · utility

Assignee

• DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES · CN

Inventors

• Danhua YUAN · Dalian, CN
• Dawei He · Cupertino, US
• Zhijia Song · Dalian, CN
• Yunpeng Xu · Fujian, CN
• Zhongmin Liu · 东风镇, CN

Key dates

• Filing date: Dec 5, 2014
• Grant date: Apr 9, 2019
• Expiry date: Dec 5, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/03
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Provided is a method for preparing a Y type molecular sieve having a high silica-to-alumina ratio, comprising: mixing deionized water, a silicon source, an aluminum source, an alkali source, and a tetraalkylammoniumcation source as a template agent to obtain an initial gel mixture; after aging the initial gel mixture at an appropriate temperature, feeding the gel mixture into a high pressure synthesis kettle for crystallization; separating a solid product, and drying to obtain the Y type molecular sieve having a high silica-to-alumina ratio. The method provides a phase-pure Y type molecular sieve having a high crystallinity, the SiO2/Al2O3 thereof being not less than 6.