The hydrometallurgy of copper . be carried into the precipitate by suspension. If the ore con-tains much alumina and the solution issuing from the leaching tanks isneutral or alkaline, a white gelatinous substance, probably aluminumhydroxide, settles out of the clear or milky solution, and may in this wayget into the precipitate. On the addition of acid this precipitate isredissolved and the solution becomes clear. Metals which are precipitated by hydrogen sulphide, as sulphide, froma solution of their salts in the presence of free acid, are: Platinum, color of precipitate, dark brown. Gold, c
The hydrometallurgy of copper . be carried into the precipitate by suspension. If the ore con-tains much alumina and the solution issuing from the leaching tanks isneutral or alkaline, a white gelatinous substance, probably aluminumhydroxide, settles out of the clear or milky solution, and may in this wayget into the precipitate. On the addition of acid this precipitate isredissolved and the solution becomes clear. Metals which are precipitated by hydrogen sulphide, as sulphide, froma solution of their salts in the presence of free acid, are: Platinum, color of precipitate, dark brown. Gold, color of precipitate, dark brown. Silver, color of precipitate, black. Copper, color of precipitate, black. Lead, color of precipitate, black. Tin, color of precipitate, yellow-brown. Antimony, color of precipitate, orange. Arsenic, color of precipitate, yellow. Mercury, color of precipitate, black. Cadmium, color of precipitate, yellow. 280 HYDROMETALLURGY OF COPPER ifli:t~i -- ?? ? — ~ _.^_ _ ? Compressed Air ^.
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192400467, bookyear1912
