US 7,601,662 B2
Copper CHA zeolite catalystsGeneral
US 7,601,662 B2
Copper CHA zeolite catalysts
Tech Center:
1700 Chemical and Materials Engineering
Examiner:
Elizabeth D Wood
Art Unit:
1793 Food, Analytical Chemistry, Sterilization, Biochemistry, Electrochemistry
Agent:
Inventors:
Ivor Bull; R. Samuel Boorse; William M. Jaglowski; Gerald S. Koermer; Ahmad Moini; Joseph A. Patchett; Wen-Mei Xue; Patrick Burk; Joseph C. Dettling; Matthew T. Caudle
Assignee:
BASF MOBILE EMISSIONS CATALYSTS LLC
Priority:
02/27/07
Filed:
02/27/08
Granted:
10/13/09
Expiration:
02/27/27
Abstract
Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.
Cooperative Patent Classification (CPC)
B01B01J23/8926B01D2255/20738B01JY02T10/12Y02TY10T428/24149Y10T