CHA-type zeolite and method for producing the same

US10953390B2 · kind B2 · utility

Assignee

• TOSOH CORPORATION · CN

Inventors

• Seiji Maehama · Yamaguchi, JP
• Hidekazu Aoyama · Shunan, JP
• Satoshi Nakamura · Yokohama, JP

Key dates

• Filing date: May 23, 2017
• Grant date: Mar 23, 2021
• Expiry date: Oct 28, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2004/45
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A CHA-type zeolite has a molar ratio of silica to alumina of 10.0 or more and less than 20.0 and a molar ratio of silanol groups to silicon of 0.15×10−2 or more and 0.50×10−2 or less, a molar ratio of silica to alumina of 20.0 or more and 35.0 or less and a molar ratio of silanol groups to silicon of 0.15×10−2 or more and 1.10×10−2 or less, a molar ratio of silica to alumina of more than 35.0 and 45.0 or less and a molar ratio of silanol groups to silicon of 0.15×10−2 or more and 1.65×10−2 or less, or a molar ratio of silica to alumina of more than 45.0 and 55.0 or less and a molar ratio of silanol groups to silicon of 0.15×10−2 or more and 1.80×10−2 or less.