Cleaning and liquid contact with solids – Processes – For metallic – siliceous – or calcareous basework – including...
Reexamination Certificate
2005-06-14
2005-06-14
Hruskoci, Peter A. (Department: 1724)
Cleaning and liquid contact with solids
Processes
For metallic, siliceous, or calcareous basework, including...
C134S003000, C134S022170, C134S022190, C134S040000, C134S041000, C510S109000, C510S161000
Reexamination Certificate
active
06905550
ABSTRACT:
Removal of water-insoluble organic residues from inorganic surfaces can be accomplished in aqueous cleaning solutions containing an oxidant at a preselected temperature wherein the pH is adjusted with respect to the isoelectric point of the surface material to be removed so that the pH is above the pK, and the isoelectric point of the surface for acid materials, and below the PKa and the isoelectric point of the surface for basic materials. Surfactants can also be added to the cleaning solution.
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Brant et al, “Aqueous-Based Cleaning with Hydrogen Peroxide”, J. Environ. Sci. Health, A31(9), 1996, pp2409-2434.
Zhang et al, “Hydrogen Peroxide Cleaning of Asphalt from Surfaces: Effect of Temperature”, AiChE Summer National Meeting, Boston, MA, Jul. 30-Aug. 2, 1995.
Hruskoci Peter A.
Merchant & Gould P.C.
Princeton Trade & Technology, Inc.
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