Stabilized sodium carbonate peroxyhydrate

C - Chemistry – Metallurgy – 01 – B

Patent

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Details

C01B 15/10 (2006.01) C11D 3/02 (2006.01) C11D 3/39 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2333271

The invention relates to stabilized sodium carbonate peroxyhydrate (SCPH) particles having a coating layer comprising a mixture of lithium sulphate and sodium sulphate, said sulphates preferably being present in substantially equimolar amounts. The coated SCPH particles can be prepared by fluidized bed coating. The coated SCPH particles have good stability when used in detergents containing zeolites.

La présente invention concerne des particules de carbonate-peroxyhydrate de sodium stabilisées (SCPH) pourvues d'une couche d'enrobage. Cet enrobage est fait d'un mélange de sulfate de lithium et de sulfate de sodium, lesquels sels sont présents de préférence selon des proportions équimolaires. Ces particules SCPH enrobées se prêtent à l'enrobage dans un lit fluidisé. Une fois enrobées, les particules SCPH se distinguent par une bonne stabilité convenant à l'utilisation avec des détergents contenant des zéolites.

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