Cleaning and liquid contact with solids – Processes – Paints – varnishes – lacquers – or enamels – removal
Patent
1992-07-14
1993-08-31
Morris, Theodore
Cleaning and liquid contact with solids
Processes
Paints, varnishes, lacquers, or enamels, removal
210712, 210930, B08B 300, B08B 700, B01D 2101, C02F 152
Patent
active
052405095
ABSTRACT:
Methods of treating circulating water containing over-sprayed, water-borne paint, alone or in combination with over-sprayed solvent-borne paint, as in a paint spray booth operation, comprise maintaining the alkalinity of the paint spray booth water between about 50 and 2000 ppm, on a calcium carbonate basis, by adding an alkalinity source thereto, maintaining the pH between about 6.0 and 9.0, adding a melamine polymer to the water, adding an aluminum salt to the water, contacting the over-sprayed paints with the alkalinity-adjusted paint spray booth water before or after addition of the melamine polymer and aluminum salt, 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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Guerrini Robert J.
Rey Paul A.
Calgon Corporation
Caruso C. M.
El-Arini Zeinab
Mitchell W. C.
Morris Theodore
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