Catalyst for purifying exhaust gas
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United States of America Patent
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Sep 15, 1998
Issued Date -
N/A
app pub date -
Oct 13, 1993
filing date -
Dec 18, 1990
priority date (Note) -
Expired
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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.
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