FIELD: chemistry.
SUBSTANCE: composition contains sulphuric acid and at least one surfactant causing the contact angle decrease on the glass in 1 s ca at least 10° being taken in concentration from 0.1 to 0.3% wt in 2% water solution of H2SO4 at temperature 23°C. The said surfactant is one non-ionic surfactant selected from defined group, one anionic surfactant selected from defined group and one amphoterous surfactant selected from defined group.
EFFECT: increase of the metal yield and decrease of the acid consumption.
6 cl, 3 tbl
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