Catalyst for purifying exhaust gas

Details Catalyst for purifying exhaust gas Catalyst for purifying exhaust gas

1993-10-13

1998-09-15

Myers, Helane

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232392, 502243, 502347, C01B 2120

Patent

active

058075283

ABSTRACT:
A catalyst for purifying an exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from an oxygen rich exhaust gas containing the same, comprising (i) a zeolite having an SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio of at least 15 and (ii) (a) silver and, optionally, (b) an alkali metal and/or an alkaline earth metal incorporated therein.

REFERENCES:
patent: 3346328 (1967-10-01), Sergeys et al.
patent: 3447893 (1969-06-01), Stephens et al.
patent: 5149511 (1992-09-01), Montreuil et al.
patent: 5206196 (1993-04-01), Nakano et al.
patent: 5208198 (1993-05-01), Nakano et al.
patent: 5223236 (1993-06-01), Inoue et al.
patent: 5270024 (1993-12-01), Kasahara et al.
patent: 5382416 (1995-01-01), Nakano et al.

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