Process for preparing porous spherical silica xerogels
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United States of America Patent
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Aug 15, 2000
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app pub date -
Apr 8, 1996
filing date -
Nov 4, 1993
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Abstract
Process for preparing porous spherical silica particles substantially consisting in emulsifying an acidic silica sol in a dispersing media, gelifying the microdrops of the sol in the emulsified state and submitting the resulting gel to thermal treatment in the presence of the emulsifier liquid and of sol gelation base.
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