Process for producing crystalline type-a zeolite powder

Details Process for producing crystalline type-a zeolite powder Process for producing crystalline type-a zeolite powder

C - Chemistry, Metallurgy

11

D

252/15

C11D 3/12 (2006.01)

Patent

CA 1150222

ABSTRACT OF THE DISCLOSURE A crystalline type-A zeolite powder, which can be used as a phosphate substitute in detergents, is produced by precipitation reaction in that in a defined sequence sodium-tetrasilicate solution and sodium-aluminate liquor are simultaneously passed to a reactor containing water, whereupon sodium-tetrasilicate solution is added first and sodium-aluminate liquor thereafter. The crystalline product has an average particle size of 6.7 to 8 µm and a narrow particle size distribution curve.

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