Catalyst for removing nitrogen oxide and process for producing the catalyst
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United States of America Patent
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Jan 17, 1989
Grant Date -
N/A
app pub date -
Jul 2, 1987
filing date -
Jul 4, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A catalyst for removing nitrogen oxides whose activity deterioration due to volatile poisons contained in exhaust gases is prevented and which has a superior endurance, and a process for producing the catalyst are provided, which catalyst comprises a titania having a surface area of 20 m.sup.2 /g or less and a zeolite having 0.01 to 20% by weight of copper supported thereon; having an average pore diameter of 10 .ANG. or less; and having a silica/alumina molar ratio of 10 or more, and which process comprises mixing powder of the zeolite with the titania or its precursor, followed by molding the mixture into a predetermined shape, followed by calcining the resulting material at 800.degree. C. or higher.
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