Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Patent
1997-05-29
1998-10-20
Anthony, Joseph D.
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
510190, 510245, 510264, 510402, 510407, 252364, 134 2, 134 3, 134 41, 134 2219, C11D 722, C11D 750, B01F 100, C23G 500
Patent
active
058246312
ABSTRACT:
A liquid composition useful for selective dissolution of soft metal is disclosed. The composition comprises an organic nitrocompound and a carboxylic acid. The organic nitrocompound, upon exposure to the soft metal, oxidizes the soft metal to form a first soft metal salt. The carboxylic acid, upon exposure to the soft metal salt, react with the first soft metal salt to form a second soft metal salt that is soluble in the composition. Related methods are also disclosed.
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Johnson Gary V.
Wagenknecht John H.
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