Process for producing exhaust treatment catalyst powders, and their use
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United States of America Patent
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Aug 13, 2013
Grant Date -
Dec 31, 2009
app pub date -
Jun 27, 2008
filing date -
Jun 27, 2008
priority date (Note) -
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Abstract
A process is described for producing a powder batch comprises a plurality of particles, wherein the particles include (a) a first catalytically active component comprising at least one transition metal or a compound thereof; (b) a second component different from said first component and capable of removing oxygen from, or releasing oxygen to, an exhaust gas stream; and (c) a third component different from said first and second components and comprising a refractory support. The process comprises providing a precursor medium comprising a liquid vehicle and a precursor to al least one of said components (a) to (c) and heating droplets of said precursor medium carried in a gas stream to remove at least part of the liquid vehicle and chemically convert said precursor to said at least one component.
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