Method of catalyst preparation by high-temperature hydrothermal

Details Method of catalyst preparation by high-temperature hydrothermal Method of catalyst preparation by high-temperature hydrothermal

1995-06-07

1998-06-30

Gorgos, Kathryn L.

Coating processes

Immersion or partial immersion

Metal base

376301, 376305, 376306, 422 11, 422 14, 422 19, B05D 118, G21C 900

Patent

active

057730962

ABSTRACT:
A method of depositing noble metals on surfaces or matrices to manufacture industrial catalysts that can be used in a variety of applications. Such deposition of noble metals can be achieved by treating the surfaces in high-temperature (150.degree. C. or higher) water containing dissolved noble metal ions or its colloidal suspensions. The method consists of the steps of placing the surface of a metal substrate in contact with a volume filled with high-temperature water; injecting a solution of a noble metal compound into the volume for a predetermined duration; and removing the surface of the metal substrate from contact with the high-temperature water after expiration of said predetermined duration. The noble metal compound has the property that it releases species of the noble metal in high-temperature water. These noble metal species deposit on or incorporate in the oxide film on the surface of the metal substrate.

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Fontana, Mars G., Corrosion Engineering, third edition, 1986, pp. 228-229.

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