METHOD OF REMOVING DEPOSITS CONTAINING MAGNETITE AND COPPER FROM CONTAINERS OF INDUSTRIAL AND ELECTRICAL INSTALLATIONS Russian patent published in 2012 - IPC C23G1/00 C23G1/19 F28G9/00 

FIELD: chemistry.

SUBSTANCE: at the first step of the method, the container is treated with an alkaline detergent solution containing a complexing agent which forms a soluble complex with iron ions, a reducing agent and a leaching agent, and at the second step, the detergent solution from the first step, which is in the container, is mixed with an additional complexing agent which forms a complex with iron (III) ions which is stable compared to the complexing agent used at the first step, and an oxidant.

EFFECT: method enables to remove deposits containing magnetite and copper from containers of industrial and electrical installations with negligible loss of the basic metal.

23 cl, 1 tbl, 3 ex