Iron-containing aluminosilicate zeolites and methods of making and using same

US8541331B2 · kind B2 · utility

Assignee

• PQ Corporation · US

Inventors

• Hong-Xin Li · Allentown, US
• William E. Cormier · Lansdale, US
• Bjorn Moden · West Chester, US

Key dates

• Filing date: Aug 13, 2008
• Grant date: Sep 24, 2013
• Expiry date: Apr 5, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

There is disclosed iron-containing aluminosilicate zeolites having both framework iron and iron cations on the ion-exchange sites. There is also disclosed a direct synthesis method of making an iron-containing aluminosilicate zeolite, which does not require the use of an intermediate step, such as ion-exchange or impregnation. In addition, there is disclosed a method of using the iron-containing aluminosilicate zeolite disclosed herein in a selective catalytic reduction reaction, typically in the presence of ammonia, to reduce or remove nitric oxides from exhaust emissions.