Evaporative treatment of inorganic saponifier wash water
AssigneeChurch & Dwight Co., Inc.
InventorAnthony E. Winston
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Abstract
The aqueous effluent from the wash cycle of a process for cleaning electronic circuit assemblies of rosin flux and other organic residues with an aqueous alkaline cleaning solution comprises evaporating the effluent to cause separation of an aqueous vapor phase and a solid phase comprising residues of the rosin flux and residues of the cleaning solution including alkaline salts such as alkali metal carbonates and bicarbonates and organic adjuvants such as surfactants which do not vaporize.
Claims15
A process for treating an aqueous cleaning effluent derived from the wash cycle of a process for cleaning electronic circuit assemblies with an aqueous alkaline cleaning solution having a pH from about 10 to about 13 and containing rosin flux residues, and inorganic alkaline salt residues and substantially no volatile organic compounds comprises:
- evaporating said effluent to form an aqueous vapor phase and a solid residue comprising said rosin flux and said inorganic alkaline salt.
Dependencies are inferred from the claim text.