METHOD AND AQUEOUS LEACHING AGENT FOR TRANSFERRING METAL-CONTAINING COMPOUNDS INTO SOLUTION Russian patent published in 2011 - IPC C22B3/08 C22B15/00 

FIELD: chemistry.

SUBSTANCE: method involves leaching using an aqueous leaching agent containing sulphuric acid. The leaching agent also contains one or more alkane sulphonic acids with a propyl, ethyl or methyl residue, in weight ratio of alkane sulphonic acid to sulphuric acid between 1:1000 and 1:1 and/or a mixture of one or more salts of alkane sulphonic acids with a propyl, ethyl or methyl residue and sulphuric acid in weight ratio of the salt of alkane sulphonic acid to sulphuric acid between 1:9 and 1:99. Concentration of sulphuric acid in the leaching agent is between 0.1 wt % and 50 wt %. The leaching agent contains 0.001-50 wt % alkane sulphonic acid. The metal-containing compound contains copper, titanium, CaF₂, zinc, lead, molybdenum, antimony, bismuth, mercury, cobalt, nickel, aluminium, lanthanum, lanthanide or uranium. The leaching agent can contain one or more nonionic, anionic, cationic or amphoteric surfactants.

EFFECT: high output of metal ions into the solution.

13 cl, 4 tbl, 2 ex