Process for removal of copper from solutions of chelating agent

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal

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423DIG14, 423 42, 75101BE, 75108, 75117, 210660, 210667, 210670, 210681, 210685, 210702, C01G 300

Patent

active

046666834

ABSTRACT:
A process is provided for removing copper from a solution containing same with a chelating agent. The process is advantageously practiced on aqueous effluents from electroless plating systems to remove copper from an aminopolycarboxylic acid chelating agent such as ethylene diaminetetraacetic acid (EDTA). The process comprises contacting an acidic solution containing copper, and optionally ferric iron ions, and the chelating agent with a water insoluble ion exchange resin having a picolylamine or a pyridyl-imidozole functionality, whereby copper is selectively retained by the resin and the chelating agent remains in solution, and then removing the solution from the resin.

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