METHOD FOR ELECTROFLOTATION EXTRACTION OF SPARINGLY SOLUBLE COPPER COMPOUNDS FROM AMMONIA SYSTEMS Russian patent published in 2023 - IPC C02F1/465 C02F1/62 

FIELD: electronic equipment.

SUBSTANCE: methods for the electroflotation extraction of sparingly soluble copper compounds from ammonia systems. Invention can be used in the production of electronic circuit boards. The method includes the introduction of the composition at a mass ratio of [NH₃⁺ ]:[Cu²⁺]:[composition] equal to 1:[0.2-1]:[0.005-0.01]. The composition contains didecyldimethylammonium chloride, ethylene glycol and a cationic flocculant based on highly polymerized polyacrylamide at a mass ratio equal to 1:[0.3]:[0.25]. Electroflotation is carried out at a current density of 0.4 A/l, pH=9-11 for 15 minutes.

EFFECT: increased degree of extraction of sparingly soluble copper compounds from ammonia systems and the rate of electroflotation purification process while expanding the range of initial concentrations of ammonia (NH₃⁺) and copper (Сu²⁺).

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