LARGE CRYSTAL, ORGANIC-FREE CHABAZITE, METHODS OF MAKING AND USING THE SAME
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United States of America Patent
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Oct 25, 2012
app pub date -
Apr 17, 2012
filing date -
Apr 18, 2011
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Abstract
There is disclosed a method to synthesize microporous crystalline material comprising a metal containing chabazite having a crystal size greater than 0.5 microns and a silica-to-alumina ratio (SAR) between 5 and 15, wherein the method is carried out without the use of an organic structural directing agent and without requiring calcination. There is also disclosed a large crystal organic free chabazite made according to the disclosed method. In addition, there are disclosed methods of using the disclosed crystalline material, such as in the selective catalytic reduction of NOx in exhaust gases.
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