Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2004-10-12
2009-06-02
Nguyen, Cam N. (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S260000, C502S263000, C502S314000, C502S315000, C502S316000, C502S327000, C502S332000, C502S333000, C502S334000, C502S347000, C502S348000, C502S349000, C502S350000, C502S351000, C502S355000, C502S407000, C502S415000, C502S439000
Reexamination Certificate
active
07541310
ABSTRACT:
This invention relates to catalysts comprising a catalytic metal deposited on a composite support with well-dispersed chemical “anchor” species acting as nucleation centers for catalytic metal crystallites growth. The catalysts have the advantage that the average catalytic metal crystallite size can be controlled by the molar ratio of catalytic metal to chemical “anchor,” and is not limited by the porous structure of the support. A preferred embodiment comprises a cobalt-based catalyst on a silica-alumina support made by a co-gel method, wherein its average pore size can be controlled by the pH. The alumina species in the support most likely serve as chemical “anchors” to control the dispersion of cobalt species, such that the average cobalt crystallite size can be greater than the average pore size.
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Database CAPLUS on STN, Chemical Abstract (Columbus, Ohio, USA), An
Coy Kevin L.
Espinoza Rafael L.
Ionkina Olga P.
Jothimurugesan Kandaswamy
Ortego, Jr. James Dale
ConocoPhillips Company
Nguyen Cam N.
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