This invention relates to treated geothermal brine compositions containing reduced concentrations of lithium, iron and silica compared to the untreated brines. Exemplary compositions contain concentration of lithium ranges from 0 to 200 mg/kg, concentration of silica ranges from 0 to 30 mg/kg, concentration of iron ranges from 0 to 300 mg/kg. Exemplary compositions also contain reduced concentrations of elements like arsenic, barium, and lead.

This invention relates to treated geothermal brine compositions containing reduced concentrations of lithium, iron and silica compared to the untreated brines. Exemplary compositions contain concentration of lithium ranges from 0 to 200 mg/kg, concentration of silica ranges from 0 to 30 mg/kg, concentration of iron ranges from 0 to 300 mg/kg. Exemplary compositions also contain reduced concentrations of elements like arsenic, barium, and lead.

A process for processing a leach solution of black mass of spent alkaline batteries which leach solution comprises metals dissolved to an acidic solution. The process comprises removing of one or more elements from the leach solution by a cementation operation by applying at least one non-noble metal in a metal form as a cementation agent and one or more additional cementation agents from both sulphate and nitrate groups to process the leach solution into a product of at least manganese- and zinc-containing sulphate solution which is suitable for use as micronutrients alone, in fertilizers and/or together with a plant protective agent to aid growth and health of plants. In addition, the invention also relates to a process for processing a black mass of spent alkaline batteries.

Method for the secondary fusion aluminum slags treatment to obtain finished goods for agricultural, domestic and industrial use includes treating aluminous material with concentrated sulfuric acid to obtain aluminum sulfate, wherein the aluminous material comes from slags fed in lots of finite-dimension in a treatment plant of aluminum slags and includes aluminum oxides present in at least 30% by weight, the method includes: a) a first step of separating the metals present in the slags, by known methodologies, to obtain powders of metals as Fe, Cu, Zn, Ni and to obtain an aluminous component in the form of aluminum grains; b) a subsequent step of treating the aluminous component, with sulfuric acid to obtain aluminum sulfate in solution and/or in form of crystals; c) a subsequent step of obtaining a solid residual portion, derived from step b), apt to be used as a refractory material in applications with thermal character.

Method for the secondary fusion aluminum slags treatment to obtain finished goods for agricultural, domestic and industrial use includes treating aluminous material with concentrated sulfuric acid to obtain aluminum sulfate, wherein the aluminous material comes from slags fed in lots of finite-dimension in a treatment plant of aluminum slags and includes aluminum oxides present in at least 30% by weight, the method includes: a) a first step of separating the metals present in the slags, by known methodologies, to obtain powders of metals as Fe, Cu, Zn, Ni and to obtain an aluminous component in the form of aluminum grains; b) a subsequent step of treating the aluminous component, with sulfuric acid to obtain aluminum sulfate in solution and/or in form of crystals; c) a subsequent step of obtaining a solid residual portion, derived from step b), apt to be used as a refractory material in applications with thermal character.

This invention relates to treated geothermal brine compositions containing reduced concentrations of lithium, iron and silica compared to the untreated brines. Exemplary compositions contain concentration of lithium ranges from 0 to 200 mg/kg, concentration of silica ranges from 0 to 30 mg/kg, concentration of iron ranges from 0 to 300 mg/kg. Exemplary compositions also contain reduced concentrations of elements like arsenic, barium, and lead.

This invention relates to treated geothermal brine compositions containing reduced concentrations of lithium, iron and silica compared to the untreated brines. Exemplary compositions contain concentration of lithium ranges from 0 to 200 mg/kg, concentration of silica ranges from 0 to 30 mg/kg, concentration of iron ranges from 0 to 300 mg/kg. Exemplary compositions also contain reduced concentrations of elements like arsenic, barium, and lead.

A process and system is provided for recovery of one or more metal values using solution extraction techniques and for metal value recovery. In an exemplary embodiment, the solution extraction system comprises a first solution extraction circuit and a second solution extraction circuit. A first metal-bearing solution is provided to the first and second circuit, and a second metal-bearing solution is provided to the first circuit. The first circuit produces a first rich electrolyte solution, which can be forwarded to primary metal value recovery, and a low-grade raffinate, which is forwarded to secondary metal value recovery. The second circuit produces a second rich electrolyte solution, which is also forwarded to primary metal value recovery. The first and second solution extraction circuits have independent organic phases and each circuit can operate independently of the other circuit.

A process and system is provided for recovery of one or more metal values using solution extraction techniques and for metal value recovery. In an exemplary embodiment, the solution extraction system comprises a first solution extraction circuit and a second solution extraction circuit. A first metal-bearing solution is provided to the first and second circuit, and a second metal-bearing solution is provided to the first circuit. The first circuit produces a first rich electrolyte solution, which can be forwarded to primary metal value recovery, and a low-grade raffinate, which is forwarded to secondary metal value recovery. The second circuit produces a second rich electrolyte solution, which is also forwarded to primary metal value recovery. The first and second solution extraction circuits have independent organic phases and each circuit can operate independently of the other circuit.

A process for recovering zinc from a zinc containing material, the process including the steps of: leaching the zinc containing material with an alkaline lixiviant comprising an aqueous mixture of NH.sub.3 and NH.sub.4Cl, or ionic equivalent, having a NH.sub.4Cl concentration of between about 10 g/L and about 150 g/L H.sub.2O and a NH.sub.3 concentration of between 20 g/l H.sub.2O and 250 g/L H.sub.2O, to produce a zinc containing leachate; stripping ammonia from the leachate to produce a stripped liquor which includes a zinc containing precipitate, the stripped liquor having a NH.sub.3 concentration of between 7 and 30 g/L H.sub.2O; and recovering the zinc from the stripped liquor.