Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Patent
1995-07-31
1997-01-07
Soderquist, Arlen
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
134 2, 134 2219, 134 28, 134 41, C23G 102, B08B 300
Patent
active
055912702
ABSTRACT:
The present invention provides a method of removing lead oxide from a surface having lead oxide deposited thereon. The method includes contacting the article containing lead contaminated with radioactive material with a decontamination composition comprising about 0.01 to 5 percent, by weight, of a reductant, about 0.01 to 5 percent, by weight, of a compound selected from the group consisting of citric acid, alkali metal and ammonium salts of citric acid and mixtures thereof; 1 to 15 percent, by weight, of a compound selected from the group consisting of polyaminocarboxylic acid, alkali metal and ammonium salts of polyaminocarboxylic acid and the combination of a polyaminocarboxylic acid and a neutralizing compound and mixtures thereof; 0 to 1 percent, by weight, of a nonionic surfactant; 0 to 1 percent, by weight, of a dispersant; and 0 to 1 percent, by weight, of a corrosion inhibitor, and the balance water or other aqueous liquid.
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Corpex Technologies, Inc.
Soderquist Arlen
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