Methods for removing solids from water-based paint systems

Details Methods for removing solids from water-based paint systems Methods for removing solids from water-based paint systems

C - Chemistry, Metallurgy

02

F

362/50

C02F 1/56 (2006.01)

Patent

CA 2014727

23 METHODS FOR REMOVING SOLIDS FROM WATER-BASED PAINT SYSTEMS ABSTRACT OF THE DISCLOSURE Methods of treating circulating water containing over-sprayed, water-borne paint, such as in a paint spray booth operation, comprise adjusting the alkalinity of the paint spray booth water to between about 20 and 600 ppm, on a calcium carbonate basis, by adding an alkalinity source thereto, adding a melamine polymer to the water, contacting the over-sprayed, water-borne paint with the alkalinity-adjusted paint spray booth water before or after addition of the melamine polymer, adding an effective amount of a flocculant to the paint spray booth water, and removing resulting sludge from the paint spray booth water.

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