Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – Clay
Reexamination Certificate
2006-04-12
2010-11-09
Wood, Elizabeth D (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Zeolite or clay, including gallium analogs
Clay
C502S081000, C502S084000, C502S085000, C502S087000, C502S074000, C502S258000
Reexamination Certificate
active
07829493
ABSTRACT:
The invention relates to a method of preparing metallic nanoparticles and to the materials thus obtained. More specifically, the invention relates to a method of preparing metallic nanoparticles consisting in: selecting a precursor from the salts, hydroxides and oxides of metallic elements that can be reduced at temperatures below the clay silicate network destruction temperature; and depositing said precursor on a support selected from pseudolaminar phyllosilicate clays. According to the invention the method comprises: (i) a deposition step in which the precursor is deposited on the support: (ii) when the precursor is selected from among salts and hydroxides, a thermal decomposition step in a controlled atmosphere, in which the precursor is subjected to a decomposition process and is transformed into an oxide of the metallic element: and (iii) a reduction step in which the oxide of the metallic element is subjected to a reduction process in a controlled atmosphere. The aforementioned method is performed at temperatures below the clay silicate network destruction temperature.
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Aguilar Díez Eduardo
Álvarez Berenguer Antonio
Limpo Orozco Francisco Javier
Moya Corral José
Pecharroman Garcia Carlos
Klauber & Jackson LLC
Tolsa, S.A.
Wood Elizabeth D
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