Stabilized alkali metal percarbonate powder bleach

Details Stabilized alkali metal percarbonate powder bleach Stabilized alkali metal percarbonate powder bleach

C - Chemistry, Metallurgy

11

D

8/83

C11D 7/56 (2006.01) C01B 15/10 (2006.01) C11D 3/39 (2006.01)

Patent

CA 1137258

STABILIZED ALKALI METAL PERCARBONATE POWDER BLEACH Abstract of the Disclosure A powdered sodium percarbonate composition is provided which exhibits significantly improved percarbonate stability during storage. The sodium percarbonate is stabilized by a phosphate containing compound such as sodium tripolyphosphate or sodium orthophosphate. The powdered sodium percarbonate composition is useful as a powder bleach and preferably comprises a separation resistant bleach composition in the form of a plurality of particles, substantially each particle including sodium carbonate, sufficient sodium percarbonate to provide from about 1 to about 6 weight per cent available oxygen, and sufficient of the phosphate containing stabilizer to retard decomposition of the percarbonate.

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