Iron-loaded small pore aluminosilicate zeolites and method of making metal loaded small pore aluminosilicate zeolites

US11634335B2 · kind B2 · utility

Assignees

• Johnson Matthey Public Limited Company · GB
• Johnson Matthey Catalysts (Germany) GmbH · DE

Inventors

• Juergen Bauer · Burgkunstadt, DE
• John Leonello Casci · Redcar, GB
• Ralf Dotzel · Burgkunstadt, DE
• Joerg Werner Muench · Burgkunstadt, DE
• Ralitsa Purova · Erlangen, DE
• Wilhelm Schwieger · Spardorf, DE
• Ameen Shahid · Erlangen, DE
• Selvam Thangaraj · Erlangen, DE
• Tobias Weissenberger · Erlangen, DE

Key dates

• Filing date: Jan 10, 2020
• Grant date: Apr 25, 2023
• Expiry date: Jan 10, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/16
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention provides an iron-loaded aluminosilicate zeolite having a maximum pore opening defined by eight tetrahedral atoms and having the framework type CHA, AEI, AFX, ERI or LTA, wherein the iron (Fe) is present in a range of from about 0.5 to about 5.0 wt. % based on the total weight of the iron-loaded aluminosilicate zeolite, wherein an ultraviolet-visible absorbance spectrum of the iron-loaded synthetic aluminosilicate zeolite comprises a band at approximately 280 nm, wherein a ratio of an integral, peak-fitted ultraviolet-visible absorbance signal measured in arbitrary units (a.u.) for the band at approximately 280 nm to an integral peak-fitted ultraviolet-visible absorbance signal measured in arbitrary units (a.u.) for a band at approximately 340 nm is >about 2. The present invention further provides a method of making an metal-loaded aluminosilicate zeolite having a maximum pore opening defined by eight tetrahedral atoms from pre-existing aluminosilicate zeolite crystallites, wherein the metal is present in a range of from 0.5 to 5.0 wt. % based on the total weight of the metal-loaded aluminosilicate zeolite.