Method for synthesizing nano SAPO-34 molecular sieve, and SAPO-34 molecular sieve catalyst and application thereof

US10822244B2 · kind B2 · utility

Assignee

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

Inventors

• Pengfei Wu · Shanghai, CN
• Miao Yang · Beijing, CN
• Peng Tian · 东风镇, CN
• Zhongmin Liu · 东风镇, CN
• Linying WANG · Silong, CN
• Lin Liu · Gainesville, US

Key dates

• Filing date: Aug 2, 2016
• Grant date: Nov 3, 2020
• Expiry date: Oct 6, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/64
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for synthesizing a nano SAPO-34 molecular sieve, and an SAPO-34 molecular sieve catalyst and application thereof. A nano SAPO-34 molecular sieve is synthesized by adding a microporous templating agent and a templating agent having a functionalized organic silane to hydrothermal synthesis. The nano SAPO-34 molecular sieve is calcined to obtain a nano SAPO-34 molecular sieve catalyst. The catalyst can be used in a reaction for preparing low-carbon olefin from an oxygen-containing compound. The nano SAPO-34 molecular sieve obtained by this method has a pure CHA crystal phase. Moreover, the nano SAPO-34 molecular sieve catalyst obtained by this method has good catalytic performance in a MTO reaction, the service life of the catalyst is significantly prolonged, and the selectivity of the low-carbon olefin is improved.