PROCEDURE FOR SORPTION EXTRACTION OF VALUABLE METALS Russian patent published in 2010 - IPC C22B11/00 C22B3/10 C22B3/24 

FIELD: metallurgy.

SUBSTANCE: procedure for sorption extraction of valuable metals from mineral raw materials, containing chlorides of alkali and earth metals, consists in sintering, in cinder leaching, in sorption of valuable metals from produced pulp with usage of synthetic sorbent containing strong and weak base functional groups and in de-sorption of valuable metals. Also sorbent leaching of cinder is performed with solution of hydrochloric acid; and before de-sorption sorbent is washed in 2 stages. At the first stage sorbent is washed with a liquid phase of waste pulp, while at the second one it is washed with water. De-sorption of valuable metals is carried out with hydrochloric acid solution of Thiourea; valuable metals are successively settled from Thiourea solution of strippant with solution of ammonia hydroxide into collective concentrate. Also the procedure is performed in a cascade of 6-installations with netlike drain; volume of sorbent charge in each installation is fixed. Valuable metals are de-sorbed at temperature 50-60°C with solution containing 60-80 g/dm³ of Thiourea and 3-10 g/dm³ of hydrochloric acid. Valuable metals are settled with solution of ammonia hydroxide at pH=8.7-8.8 and temperature 50-60°C.

EFFECT: reduced duration of process and reagents consumption.

4 cl, 4 tbl, 4 ex