Patent ID: 7662238
Filing Date: 2010-02-16
Classification: C11D

Abstract:
1. A method of cleaning an evaporator coil, an air conditioning coil, an electric air filter, or other metal filter or metal coil, said method comprising: (a) mixing a pre-measured amount of a powdered coil cleaner composition into about 0.5 to about 3 gallons of water to create a solution; and (b) spraying said solution onto the filter or the coil; wherein the powdered coil cleaner composition comprises: about 40-97 wt. % strong alkali comprised of caustic soda, caustic potash, lithium hydroxide, sodium carbonate, lithium carbonate or potassium carbonate; about 1-20 wt. % surfactant; up to about 5 wt. % thickener; up to about 15 wt. % chelating agent; up to about 5 wt. % dust control agent; and up to about 65 wt. % filler.