Stabilization of metal-containing hydrogen peroxide solutions

Details Stabilization of metal-containing hydrogen peroxide solutions Stabilization of metal-containing hydrogen peroxide solutions

1986-08-25

1988-09-13

Terapane, John F.

Compositions

Oxidative bleachant, oxidant containing, or generative

Composition containing a stabilizer or a product in the form...

25218628, 134 3, 423272, 423273, C01B 15037, C23G 102

Patent

active

047708085

ABSTRACT:
Unless aqueous acidic hydrogen peroxide solutions are stabilized, an excessive rate of decomposition of hydrogen peroxide precludes their use for treatment of metal surfaces, such as of copper and copper alloys, during which use substantial concentrations of decomposition catalysts build-up in solution. Regular monitoring of the solutions for residual stabilizer content would demand sophisticated analytical equipment beyond the reach of many users.
The invention provides a stabilizer in the form of a block of sparingly soluble material, whereby monitoring can be simply and readily effected visually or by a simple electrical or mechanical detection system. For copper/copper alloys preferred stabilizers are p-hydroxybenzoic acid and triphenyl carbinol.

REFERENCES:
patent: 3480557 (1969-11-01), Shiraeff
patent: 3537895 (1970-11-01), Lancy
patent: 3556883 (1971-01-01), Naito et al.
patent: 3649194 (1972-03-01), Glanville
patent: 3756957 (1973-09-01), Shiga
patent: 3801512 (1974-04-01), Solenberger
patent: 3869401 (1975-03-01), Ernst
patent: 4059678 (1977-11-01), Winkley
patent: 4636368 (1987-01-01), Pralus

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