Synthesis of zeolites of small and uniform size

Details Synthesis of zeolites of small and uniform size Synthesis of zeolites of small and uniform size

B - Operations, Transporting

01

J

252/15

B01J 29/04 (2006.01)

Patent

CA 1132527

ABSTRACT Sodium aluminosilicate zeolites A, X, A and X are produced by the reaction of sodium aluminate and sodium silicate characterized by the steps of forming an aqueous solution of sodium aluminate; forming an aqueous solution of sodium silicate; reacting said sodium aluminate and said sodium silicate solutions at a temperature of 40° and 120°C.; the reaction mixture having the following molar ratios of components: (1) water to sodium 10:1 to 35:1 (2) sodium oxide to silica 1:1 to 4:1 (3) silica to alumina 1:1 to 10:1, continuing the reaction at these molar ratios to form the zeolite while controlling the molar ratios and reaction time to produce a fine particle size zeolite having an average particle size of less than 2 microns in diameter. These zeolites have magnesium and calcium exchange capacities which are superior to larger particle size zeolites. Also provided is a new process for making zeolite Y.

341417

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