METHOD OF PRODUCING HIGH STRENGTH AND CAPACITY CARBON SORBENT Russian patent published in 2012 - IPC C01B31/08 C22B3/24 C22B11/00 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing a carbon sorbent used for extracting rare metals, particularly gold cyanide from aqueous alkaline solutions. The method involves treatment of activated carbon with a polymer with amino groups. Activated charcoal is treated using polyhexamethylene guanidine hydrochloride in form of an aqueous solution. After treatment, alkali is added while stirring and the solution is separated from the carbon. The carbon is saturated with ammonia solution, phenol and formalin. The mixture is held while boiling for 1-5 hours and the carbon separated from the solution is dried at 150-160°C.

EFFECT: obtaining a carbon composition with high strength and anion-exchange capacity from readily available and cheap charcoal.

1 tbl, 5 ex