Composite membranes
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United States of America Patent
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Jun 19, 1990
Grant Date -
N/A
app pub date -
May 22, 1989
filing date -
May 24, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite membrane comprises a porous metal support and at least one porous inorganic film of sintered non-metallic particles carried by the support and overlying a surface thereof. The film is in longitudinal compression at ambient temperature, such that any cracks tend not to propagate. The composite membranes are mechanically robust and chemically inert and useful as filters e.g. in the food industry. They may be made by applying a sol or suspension of particles to form a layer on the porous metal support and heating the coated support to partly sinter the particles of the layer.
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