METHOD OF EXTRACTING NOBLE METALS FROM AQUEOUS SOLUTIONS AND DEVICE FOR REALISING SAID METHOD Russian patent published in 2010 - IPC C02F1/46 C22B3/20 

FIELD: chemistry.

SUBSTANCE: electrosorption carbon material is the cathode and is carbon fibric on which there is a layer a conducting polymer - poly-3,4-ethylenedioxythiophene or polyaniline which can chemically reduce ions of noble metals Ag, Au and Pd to metal state. Before passing the aqueous solution to the electrosorption carbon material, a negative potential between -0.5 and -0.3 V is applied relative a silver chloride electrode. Reduction takes place upon contact of the electrosorption carbon material with the aqueous solution in flow mode while feeding the solution at a rate of 10-20 ml per minute per square centimetre of the electrosorption carbon material. Concentration of the extracted metal in the solution is measured and the reduction process is repeated many times.

EFFECT: invention increases efficiency of extracting noble metals, shortens duration of the process of their separation and simplifies and lowers the cost of the extraction process.

4 cl, 3 ex, 1 dwg