Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Richard Keatch0
Date of Patent
December 30, 2008
Patent Application Number
11690660
Date Filed
March 23, 2007
Patent Citations Received
Patent Primary Examiner
Patent abstract
A method of removing metal scale from surfaces that includes contacting the surfaces with a first aqueous solution of a chelating agent, allowing the chelating agent to dissolve the metal scale, acidifying the solution to form a precipitant of the chelating agent and a precipitant of the metal from the metal scale, isolating the precipitant of the chelating agent and the precipitant of the metal from the first solution, selectively dissolving the precipitated chelating agent in a second aqueous solution, and removing the precipitated metal from the second solution is disclosed.
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