Catalyst for purification of diesel engine exhaust gas

Details Catalyst for purification of diesel engine exhaust gas Catalyst for purification of diesel engine exhaust gas

2005-02-15

2005-02-15

Wood, Elizabeth D. (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Sulfur or compound containing same

C502S216000, C502S217000, C502S220000, C502S221000, C502S222000, C502S223000, C502S349000

Reexamination Certificate

active

06855661

ABSTRACT:
This invention provides a new catalyst for purification of diesel engine exhaust gas comprising a carrier of at least one sulfur-resistant refractory oxide and at least one catalytic metal, wherein at least one solid acid and/or sulfuric acid is carried on the carrier by adding at least one precursor of said solid acid and/or sulfuric acid during the preparation of the carrier, and preparation thereof. The catalyst of this invention is thermally and chemically durable and can effectively remove particulate matters, hydrocarbons and nitrogen oxides contained in the diesel engine exhaust gas at low temperatures.

REFERENCES:
patent: 4759918 (1988-07-01), Homeier et al.
patent: 4849399 (1989-07-01), Joy et al.
patent: 4918041 (1990-04-01), Hollstein et al.
patent: 5000929 (1991-03-01), Horiuchi et al.
patent: 5214017 (1993-05-01), Angstadt et al.
patent: 5290530 (1994-03-01), Muramatsu et al.
patent: 5320998 (1994-06-01), Horiuchi
patent: 5489733 (1996-02-01), Soled et al.
patent: 5591414 (1997-01-01), Jacob et al.
patent: 5610117 (1997-03-01), Horiuchi et al.
patent: 5658546 (1997-08-01), Kobayashi et al.
patent: 5780383 (1998-07-01), Hollstein et al.
patent: 5911961 (1999-06-01), Horiuchi et al.
patent: 6013599 (2000-01-01), Manson
patent: 6015932 (2000-01-01), Frey
patent: 6180556 (2001-01-01), Marella et al.
patent: 6448198 (2002-09-01), Szabo et al.
patent: 42 29 471 (1994-03-01), None
Boyse, Raymond A. and Ko, Edmond I., “Crystallization Behavior of Tungstate on Zirconia and Its relationship to Acidic Properties,” Journal of Catalysis, 179: 100-110 (1998). (1).
Hua, Weiming, “Promoting Effect of Al on So4 IMxOy(M=Zr, Ti, Fe) Catalysts,” Journal of Catalysts, 196: 104-114 (2000). (1).
Xue, E. et al., “Pt-Zr02Catalysts for the Oxidation of N0 and S02, Effects of Sulfate,” Environmental Catalysis, Chapter 20, 250-267 (1994).

Affiliated with

Also associated with

Rating

Catalyst for purification of diesel engine exhaust gas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalyst for purification of diesel engine exhaust gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst for purification of diesel engine exhaust gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3468957