Catalyst support having zeolite with high sodium back ion-exchange capacity and catalysts made therefrom
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
May 21, 1999
filing date -
May 21, 1999
priority date (Note) -
Expired
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Abstract
The present invention relates to catalyst support comprising an inorganic oxide, preferably alumina, and zeolite in the proton form and having a high Si/Al ratio, wherein the zeolite is selected from those protonated zeolites that would exhibit a high Na/Al mole ratio if treated with a solution of sodium nitrate until all sites that will accept a sodium ion have done so. This invention also relates to catalyst that is made from such support, to a method of treating exhaust gas from 'lean-burn' engines using catalyst of this invention, and to a method for determining if a zeolite is a suitable support component.
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