Transition metal-substituted hydrotalcite catalyst for...

Details Transition metal-substituted hydrotalcite catalyst for... Transition metal-substituted hydrotalcite catalyst for...

2009-04-17

2010-06-22

Wood, Elizabeth D (Department: 1793)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

C423S213200, C423S235000, C423S239100, C502S526000

Reexamination Certificate

active

07740818

ABSTRACT:
Disclosed herein is a transition metal-substituted hydrotalcite catalyst for removing nitrogen oxides using a storage-reduction method, in which a molar ratio of transition metal to magnesium is 0.2 or less, and a method of manufacturing a transition metal-substituted hydrotalcite catalyst for removing nitrogen oxides using a storage-reduction method, including the steps of preparing a hydrotalcite synthesis solution including transition metal precursors such that the molar ratio of transition metal to magnesium is 0.2 or less, and preferably 0.001 to 0.2; aging the synthesis solution; and hydrothermally treating the synthesis solution.

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Vaccari, A., “Clays and catalysis: a promising future” in Elsevier Applied Clay Science 14 (1999) pp. 161-198.
Vaccari, Angelo, “Preparation and catalytic properties of cationic and anionic clays” in Elsevier Catalysis Today 41 (1998), pp. 53-71.
Kanezaki, E., “A thermally induced metastable solid phase of Mg/A1-layered double hydroxides by means of in situ high temperature powder x-ray diffraction” in Journal of Materials Science Letters 17 (1998) pp. 371-374.
Kawabata et al.,“Nickel-containing Mg-A1 hydrotalcite-type anionic clay catalyst for the oxidation of alcohols with molecular oxygen,”Journal of Molecular CatalysisA: Chemical 236 (2005) pp. 206-215. (Available online May 25, 2005).

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