Heteropolyacid and or its salt supported catalyst,...

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide

Reexamination Certificate

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C502S180000, C502S182000, C502S204000, C502S206000, C502S208000, C502S209000, C502S210000, C502S211000, C502S232000, C502S240000, C502S247000, C502S248000, C502S254000, C502S255000, C502S340000, C502S349000, C502S350000, C502S353000, C423S305000, C423S306000, C423S307000, C423S325000, C423S326000, C560S001000, C562S400000, C562S523000

Reexamination Certificate

active

07553794

ABSTRACT:
A supported catalyst comprising a support having supported thereon at least one member selected from the group consisting of heteropolyacids and heteropolyacid salts, in which the heteropolyacid and/or heteropolyacid salt is substantially present in a surface layer region of the support to a depth of 30% from the support surface. The catalyst has a high performance when used for the production of compounds by various reactions.

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Liu et al., “Structures and Catalytic Activity of Pt-Mo Bimetallic Ensembles Derived from a new Planar {PtMo6O24}8-Heteropolyanion Supported on AI2O3 and SiO2,” Journal of Catalysis 135, 367-385 (1992).

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