Silica microspheres, method of improving attrition resistance
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United States of America Patent
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Jul 7, 1992
Issued Date -
N/A
app pub date -
Sep 25, 1990
filing date -
Apr 14, 1989
priority date (Note) -
Expired
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Abstract
High-strength, non-agglomerated uniform porous microspheres of silica produced by spray drying a mixture comprising a colloidal silica sol and an additive selected from ammonium citrate or urea; an attrition resistant catalytic composite consisting essentially of metal crystallites such as palladium, platinum-palladium on said silica microsphere and method for preparing the same; and an improved process for making hydrogen peroxide from the direct combination of hydrogen and oxygen in the presence of said attrition resistant catalytic composite.
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