Process for the preparation of a two-layer metal palladium or palladium alloy composite membrane
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United States of America Patent
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Nov 8, 2011
Grant Date -
May 21, 2009
app pub date -
Jan 7, 2005
filing date -
Jan 9, 2004
priority date (Note) -
Expired
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Abstract
Process for preparing a two layer metal palladium or palladium alloy composite membrane consisting of a porous substrate support and a palladium or palladium alloy membrane by rinsing/washing and drying the porous substrate support, treating the porous substrate support with a pore filler in order to decorate the pores of the support and the disfigurements of the substrate surface, sensitizing and activating with a palladium solution the decorated substrate support, and plating the resulting support with a palladium solution to form the two layer composite membrane, drying. The resulting composite membrane is subjected to a post-processing where the pore fillers residing in the pore-channels of the porous substrate are partly removed or reduced in volume through heating.
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