Process for stabilising particulate alkali metal percarbonate

Details Process for stabilising particulate alkali metal percarbonate Process for stabilising particulate alkali metal percarbonate

C - Chemistry, Metallurgy

01

B

C01B 15/10 (2006.01) C11D 3/16 (2006.01) C11D 3/39 (2006.01) C11D 7/18 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2177981

The invention relates to a process for stabilising particulate alkali metal percarbonate by coating it with an aqueous solution, preferably concentrated, of a complex formed from a boric acid or borate and an organic diol, polyol or hydroxycarboxylic acid. The coat can additionally contain an alkali metal neutral salt such as sodium chloride or sodium sulphate.

L'invention se rapporte à un procédé de stabilisation de percarbonate métallique alcalin particulaire, consistant à enrober ce percarbonate à l'aide d'une solution aqueuse, de préférence concentrée, d'un complexe formé à partir d'un acide borique ou d'un borate ainsi que d'un diol organique, d'un polyol ou d'un acide hydroxycarboxylique. Le revêtement peut en outre contenir un sel neutre d'un métal alcalin tel qu'un chlorure ou un sulfate de sodium.

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