IMPROVEMENTS IN THE ION-EXCHANGE METHOD OF PREPARING SILICA SOLS |
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| Authors: | W. K. SMITH |
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| Affiliation: | Imperial Chemical Industries Ltd., Butterwick Research Laboratories, The Frythe, Welwyn, Herts |
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| Abstract: | ![]()
SUMMARY: An improved ion-exchange column for producing stable silica sols is described. Best results were obtained with a sulphonic-polystyrene resin. The storage life of sols so produced may be extended to as much as two months by refrigeration and acidification with hydrochloric acid. Silica sol has a buffering action in the region of pH 2. Silica gel media prepared from such sols are comparable in cost with agar media. |
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