Sodium aluminate → Molecular sieve

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The sodium aluminate solution was reacted with the calculated amount of sodium silicate solution under vigorous agitation in a 15 liter vessel (temperature of the solutions 20° to 80° C). A sodium aluminosilicate that was x-ray amporphous was produced as primary precipitation product in an exothermic reaction. After ten minutes of vigorous agitation the suspension of the precipitation product was either

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