Patent · US Active

High silica chabazite for selective catalytic reduction, methods of making and using same

US10384162B2 · kind B2 · utility

0Cited by

20References

34Claims

0Family size

Assignee

PQ Corporation · US

Inventors

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

Key dates

Filing date	Dec 17, 2009
Grant date	Aug 20, 2019
Priority date	—
Expiry date	Feb 26, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01J2235/30
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

There is disclosed a microporous crystalline material comprising a metal containing chabazite having a crystal size greater than 0.5 microns and a silica-to-alumina ratio (SAR) greater than 15, wherein the metal containing chabazite retains at least 80% of its initial surface area and micropore volume after exposure to temperatures of up to 900° C. in the presence of up to 10 volume percent water vapor for up to 1 hour. Methods of using the disclosed crystalline material, such as in the SCR of NOx in exhaust gas are also disclosed, as are methods of making such materials.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.