METHOD OF METAL RECOVERY FROM SOLID-PHASE RAW-MATERIALS Russian patent published in 2009 - IPC C22B3/04 C22B3/40 

FIELD: metallurgy.

SUBSTANCE: method of metal extraction recovery from solid-phase of raw-materials includes crushing of raw materials, leaching by means of direct microemulsion, consisting of aqueous phase and organic phase, containing kerosene in the capacity of extractant di-(2-ethylhexyl) sodium phosphate, separation of solid phase and re-extraction of recovered metals. At that leaching is implemented by microemulsion, consisting of 30-75% turn of aqueous phase and containing in organic phase di-(2- ethylhexyl) sodium phosphate in amount 1.0-2.0 mole/l and additionally introduced di-(2-ethylhexyl) phosphoric acid in amount 0.3-0.6 mole/l. Into compound of organic phase of microemulsion i can be additionally introduced aliphatic alcohols in amount till 5% turns.

EFFECT: ability of selective extraction of nonferrous and rare metals raw at leaching stage, without usage of concentrated acid and expensive organic solvent.

9 tbl, 7 ex