Stabilising concentrated hydrogen peroxide solutions

Details Stabilising concentrated hydrogen peroxide solutions Stabilising concentrated hydrogen peroxide solutions

C - Chemistry, Metallurgy

01

B

23/292

C01B 15/037 (2006.01)

Patent

CA 2021264

Concentrated solutions of hydrogen peroxide tend to decompose on storage, thereby losing their effectiveness, amongst other reasons by virtue of interaction with contaminating transition metals. Peroxygen compounds are stabilised by contact with a stabilising amount of compound of general formula: (See formula I) in which X represents a methylene phosphonic acid group of formula -CH2-(-PO3H2) or salt thereof, R represents a tetra methylene diradical, optionally alkyl-substituted, that completes a cyclo-aliphatic ring and thereby establishes the two NX2 groups in a substantially fixed configuration and Y represents a hydrogen or lower alkyl group. Preferably, the solutions contain additionally one or more co-stabilisers, including stannate, phosphates, hydroxybenzoic acid, citric acid and nitrate. The stabiliser system can enable the solution to be diluted, even with municipal water.

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