Cleaning and liquid contact with solids – Processes – Miscellaneous
Reexamination Certificate
2007-01-30
2007-01-30
Langel, Wayne A. (Department: 1754)
Cleaning and liquid contact with solids
Processes
Miscellaneous
C252S186290, C423S272000, C423S273000, C510S375000
Reexamination Certificate
active
10820981
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 about 10 ppm pyrophosphate, preferably no pyrophosphate; and has a pH greater than 7.0, preferably about 8.0 to about 10.5.
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Genco Keith Robert
Wang Xue
Arkema Inc.
Boyd Steven D.
Langel Wayne A.
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