Process for the manufacture of a catalyst for the reduction of nitrogen oxides in exhaust gases
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United States of America Patent
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Jun 14, 1988
Grant Date -
N/A
app pub date -
Dec 5, 1986
filing date -
Dec 12, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a process for the manufacture of a catalyst for the reduction of nitrogen oxides in exhaust gases. The catalyst contains a metal oxide. The catalyst is preferably used for catalytic reduction with ammonia. The process comprises screening a natural goethite iron ore to the required grain size and then treating the ore with sulfuric acid. Subsequently, the goethite iron ore is heated to a temperature which approximately equals the temperature at which it will be used in the catalytic reaction.
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