Stabilization of alkaline hydrogen peroxide

Details Stabilization of alkaline hydrogen peroxide Stabilization of alkaline hydrogen peroxide

2007-01-18

2008-03-11

Langel, Wayne A. (Department: 1793)

Cleaning and liquid contact with solids

Processes

Miscellaneous

C252S186290, C423S272000, C423S273000, C510S375000

Reexamination Certificate

active

07341636

ABSTRACT:
A stabilized basic aqueous hydrogen peroxide composition is disclosed. The composition contains about 0.3 wt % to about 15 wt % of hydrogen peroxide; water; and a stabilizer system that contains about 10 ppm to about 1% of a stannate stabilizer; 10 ppm to about 1% of a phosphonic acid chelating agent or a mixture of phosphonic acid chelating agents; and 10 ppm to about 1% of an aromatic chelating agent or a mixture of aromatic chelating agents. The composition comprises less than 10 ppm pyrophosphate, preferably no pyrophosphate; and has a pH greater than 7.0, preferably about 8.0 to about 10.5.

REFERENCES:
patent: 5130053 (1992-07-01), Feasey et al.
patent: 5302311 (1994-04-01), Sugihara et al.

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