Process for the reduction of the particle size of coarse...

Details Process for the reduction of the particle size of coarse... Process for the reduction of the particle size of coarse...

C - Chemistry, Metallurgy

11

D

241/135, 252/15

C11D 3/12 (2006.01) B02C 19/16 (2006.01) B07B 1/28 (2006.01) C01B 33/26 (2006.01)

Patent

CA 1161817

A B S T R A C T A process for the reduction of the particle size of coarse-grain, crystalline zeolitic sodium aluminosilicate of the NaA type obtained in an aqueous alkaline suspension by crystallization of a reaction mixture suspension formed from sodium aluminate solution and sodium silicate solution, said sodium aluminosilicate having a large cation exchange capacity consisting essentially of subjecting said aqueous alkaline suspension of the crytallized sodium aluminosilicate to treatment on a vibrating screen having a substantially uniform mesh size between 25 to 100 µm, the number of vibra- tions per minute and the amplitude of oscillation of said screen being so selected that at least 99.95% by weight, based on the anhydrous weight, of sodium aluminosilicate particles recovered have a particle size of less than 100 µm, the said aqueous alkaline suspension of the crystallized sodium aluminosilicate having a molar ratio of: 2.5-5 Na20 : 1 A1203 : 1.8 to 2 Si02 : 50-100 H20

377935

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