Catalyst for purifying exhaust gas
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United States of America Patent
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-
Aug 22, 1995
Grant Date -
N/A
app pub date -
Aug 7, 1992
filing date -
Aug 7, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A catalyst for purifying an exhaust gas comprising a zeolite catalyst ion exchanged with cobalt and at least one alkaline earth metal and a zeolite catalyst ion-exchanged with copper, provided on an inlet side of an exhaust gas stream and an outlet side of the exhaust gas respectively, or randomly present in a mixed state.
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