27results about "Copper compounds preparation" patented technology

This disclosure relates to a process for removing cadmium and copper, and optionally arsenic, from phosphoric acid solutions typically obtained by wet methods. The process can also allow for the selective and separate recovery of cadmium, copper, and arsenic.

The invention belongs to the technical field of resource recycling and metal organic framework material preparation, and particularly relates to a method for efficiently extracting a copper element from copper-indium-gallium-selenium powder and then directly synthesizing a copper-containing MOF material. The method comprises the steps that (1) the copper-indium-gallium-selenium powder and a prepared mixed solution of acid and hydrogen peroxide are subjected to contact leaching, and a solution A is obtained; (2) mixing the solution A with a first extraction agent to obtain a solution B and an organic phase A; adjusting the pH value of the solution B to 1.5, and adding a second extraction agent to obtain a solution C and an organic phase B; adding a nitric acid aqueous solution into the organic phase B for reverse extraction to obtain a copper nitrate solution and an organic phase C; (3) carrying out a hydrothermal reaction on a solution containing the organic ligand and the obtained copper nitrate solution to obtain a blue precipitate, namely a Cu-BTC material; according to the method, efficient recovery and efficient separation of the copper ions are achieved, and the Cu-BTC material with high purity is obtained in a low-cost and efficient mode.

The present invention relates to a method for removing cadmium and copper and optionally arsenic contained in phosphoric acid solutions typically obtained in wet processes. The process also enables selective and separate recovery of cadmium, copper and arsenic.

The invention relates to the technical field of wastewater treatment, and discloses a treatment process of sulfur-free and iron-free copper-containing wastewater and application of the treatment process in copper sulfate recovery, the process comprises the following steps: (1) physically filtering the copper-containing wastewater, adjusting the pH value to be less than 4, carrying out oxidation pretreatment, and feeding the copper-containing wastewater into an ion exchange system; and (2) after adsorption, introducing the wastewater into an adsorber containing adsorption particles, applying a magnetic field, carrying out solid-liquid separation, detecting that Cu < 2 + > in the liquid is less than 0.5 mg / L, adjusting the pH value to be neutral, and then discharging. Compared with a traditional copper-containing wastewater treatment process, a polypeptide magnetic adsorption step is added behind an ion exchange system, when Cu < 2 + > in the ion exchange system is about 50 mg / L, Cu < 2 + > is transferred into an adsorber for magnetic adsorption, and the wastewater treatment period can be greatly shortened. In the recovery process of the copper sulfate, the concentration of Cu < 2 + > in the copper-containing wastewater desorption solution is high, and the concentration of impurity ions is low, so that the subsequent recovery and purification process of the copper sulfate is simplified, and the cost is reduced.

Compositions comprising high levels of high specific activity copper-64, and process for preparing said compositions. The compositions comprise from about 2 Ci to about 15 Ci of copper-64 and have specific activities up to about 3800 mCi copper-64 per microgram of copper. The processes for preparing said compositions comprise bombarding a nickel-64 target with a low energy, high current proton beam, and purifying the copper-64 from other metals by a process comprising ion exchange chromatography or a process comprising a combination of extraction chromatography and ion exchange chromatography.

Compositions comprising high levels of high specific activity copper-64, and process for preparing said compositions. The compositions comprise from about 2 Ci to about 15 Ci of copper-64 and have specific activities up to about 3800 mCi copper-64 per microgram of copper. The processes for preparing said compositions comprise bombarding a nickel-64 target with a low energy, high current proton beam, and purifying the copper-64 from other metals by a process comprising ion exchange chromatography or a process comprising a combination of extraction chromatography and ion exchange chromatography.

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.

Compositions comprising high levels of high specific activity copper-64, and process for preparing said compositions. The compositions comprise from about 2 Ci to about 15 Ci of copper-64 and have specific activities up to about 3800 mCi copper-64 per microgram of copper. The processes for preparing said compositions comprise bombarding a nickel-64 target with a low energy, high current proton beam, and purifying the copper-64 from other metals by a process comprising ion exchange chromatography or a process comprising a combination of extraction chromatography and ion exchange chromatography.

Provided is a method for recovering a precursor metal for secondary cell cathode material using synergistic solvent extraction applied with extractant degradation preventing technology including: (a) leaching a low grade MHP and sulfuric acid by high temperature and high pressure oxidation reaction; (b) separating a solution leached by the oxidation reaction and precipitant of an impurity containing iron (Fe); (c) recovering copper as copper sulfate solution by solvent extraction from the leached solution of (b); (d) precipitating and removing some impurities by injecting a neutralizing agent into a raffinate after solvent extraction of cooper in (c); and (e) recovering zinc, cobalt, and nickel from a solution from which some impurities are removed in (d) by means of the synergetic solvent extraction (SSX) to be selectively separated as a raffinate containing manganese, calcium, and magnesium.

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.

A Cu-61 separation and purification method based on multistage resin combination comprises the following steps: step 1, placing an irradiated target material in HCl, heating until the target material is completely dissolved, and then filtering to obtain a clear solution; 2, filling a chromatographic column with ZR resin for activation; loading the clarified solution obtained in the step 1 to adsorb Ga ions in the clarified solution, and collecting effluent; washing the chromatographic column; step 3, filling AG1-X8 resin into a chromatographic column, loading the ZR resin effluent obtained in the step 2, and then washing; then carrying out gradient elution, and collecting an eluent; and 4, neutralizing the eluent obtained in the step 3, and evaporating and concentrating to a target volume. According to the method, a resin function cooperation mechanism is adopted, the ZR resin has super-strong selectivity and large adsorption capacity on Ga ions on the basis of a hydroxamic acid group, the AG1-X8 resin captures Cu ions through anion exchange, and Cu and Zn isotopes are accurately separated in combination with gradient elution.

The present disclosure is directed compositions and formulations comprising high levels of high specific activity copper-64, and process for preparing said compositions. The compositions comprise from about 2 Ci or greater of copper-64 and have specific activities up to about 3850 mCi copper-64 per microgram of copper. The processes for preparing said compositions comprise bombarding a nickel-64 target with a low energy, high current proton beam, and purifying the copper-64 from other metals by a process comprising ion exchange chromatography or a process comprising a combination of extraction chromatography and ion exchange chromatography.

The present application relates to heap leaching a base metal-containing material. A two stage heap leach method for leaching a base metal from a base metal-containing material. The method transfers at least a part of a pregnant leach solution from a 1st stage leach in a 1st heap, or a leach solution produced after processing the pregnant leach solution, to a 2nd stage leach in a 2nd heap. The method controls conditions in the 1st and 2nd leach stages to allow the method to operate effectively, particularly but not exclusively in cold climates, such as cold climates where there are large temperature variations during a day and across seasons.

The present application relates to heap leaching a base metal-containing material. A two stage heap leach method for leaching a base metal from a base metal-containing material. The method transfers at least a part of a pregnant leach solution from a 1st stage leach in a 1st heap, or a leach solution produced after processing the pregnant leach solution, to a 2nd stage leach in a 2nd heap. The method controls conditions in the 1st and 2nd leach stages to allow the method to operate effectively, particularly but not exclusively in cold climates, such as cold climates where there are large temperature variations during a day and across seasons.

Disclosed herein is a method for recovering metals from electronic waste or a leach residue thereof, the electronic waste or leach residue comprising elemental copper and one or more lithium compounds, the method comprising: leaching the electronic waste or leach residue with a leach solution comprising ammonium sulphate in the presence of an oxidant to provide a leachate comprising Cu ions and Li ions and a solid residue; and separating the leachate and the solid residue.

Compositions comprising high levels of high specific activity copper-64, and process for preparing said compositions. The compositions comprise from about 2 Ci to about 15 Ci of copper-64 and have specific activities up to about 3800 mCi copper-64 per microgram of copper. The processes for preparing said compositions comprise bombarding a nickel-64 target with a low energy, high current proton beam, and purifying the copper-64 from other metals by a process comprising ion exchange chromatography or a process comprising a combination of extraction chromatography and ion exchange chromatography.

The invention discloses a metal oxide nano material, a surface modification method thereof and an array type gas sensor. The surface modification method comprises the following steps: quickly immersing a metal oxide nano material subjected to high-temperature heating treatment into a low-temperature transition metal salt solution for quenching treatment; crystal lattices on the surface or near the surface of the quenched metal oxide nano material are subjected to unbalanced reconstruction, and transition metal ions and crystal lattice defects of the transition metal salt solution are introduced. According to the present invention, by using the instantaneous temperature difference and the ion exchange reaction, the lattice reconstruction and the high-density defect introduction on the surface of the metal oxide nanometer material are achieved within the second-level time, such that the gas sensitive property of the material is significantly improved, the detection limit is as low as 2.7 ppb, and the response time is substantially shortened.

To provide methods of recovering metals from an ore containing metal sulfides.SOLUTION: The methods involve contacting the metal sulfides with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, where the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.SELECTED DRAWING: Figure 1

The invention relates to heap leaching of base metal containing materials. A two-stage dump leaching process for leaching a base metal from a base-metal-containing material. The method transfers at least a portion of the enriched leach solution from the first stage leach in the first stack or the leach solution produced after processing the enriched leach solution to the second stage leach in the second stack. The method controls the conditions in the first extraction stage and the second extraction stage to allow the method to operate efficiently, in particular, but not limited to, in cold climates, such as during the day and in cold climates where there are large temperature variations across seasons.

To provide a purification process for the preparation of non-carrier added copper-64.SOLUTION: There are provided compositions comprising high levels of high specific activity copper-64, and process for preparing the compositions. The compositions comprise from about 2 Ci to about 15 Ci of copper-64 and have specific activities up to about 3800 mCi copper-64 per microgram of copper. The processes for preparing the compositions comprise: bombarding a nickel-64 target with a low energy, high current proton beam; and purifying the copper-64 from other metals by a process comprising ion exchange chromatography or a process comprising a combination of extraction chromatography and ion exchange chromatography.SELECTED DRAWING: Figure 1

Disclosed herein is a method for recovering metals from e-waste or its leach residue, where the e-waste or leach residue comprises elemental copper and one or more lithium compounds, the method comprising: leaching the e-waste or leach residue with a leach solution comprising ammonium sulfate in the presence of an oxidizing agent to provide a leachate and a solid residue comprising Cu ions and Li ions; and separating the leachate and solid residue.

The present disclosure relates to a method for removing cadmium and copper, and optionally arsenic, contained in phosphoric acid solutions typically obtained in a wet process. The method can also allow the cadmium, copper and arsenic to be recovered selectively and separately.

Compositions comprising high levels of high specific activity copper-64, and process for preparing said compositions. The compositions comprise from about 2 Ci to about 15 Ci of copper-64 and have specific activities up to about 3800 mCi copper-64 per microgram of copper. The processes for preparing said compositions comprise bombarding a nickel-64 target with a low energy, high current proton beam, and purifying the copper-64 from other metals by a process comprising ion exchange chromatography or a process comprising a combination of extraction chromatography and ion exchange chromatography.

Compositions comprising high levels of high specific activity copper-64, and process for preparing said compositions. The compositions comprise from about 2 Ci to about 15 Ci of copper-64 and have specific activities up to about 3800 mCi copper-64 per microgram of copper. The processes for preparing said compositions comprise bombarding a nickel-64 target with a low energy, high current proton beam, and purifying the copper-64 from other metals by a process comprising ion exchange chromatography or a process comprising a combination of extraction chromatography and ion exchange chromatography.

The invention relates to heap leaching of base metal containing materials. A two-stage dump leaching process for leaching a base metal from a base-metal-containing material. The method transfers at least a portion of the enriched leach solution from the first stage leach in the first stack or the leach solution produced after processing the enriched leach solution to the second stage leach in the second stack. The method controls the conditions in the first extraction stage and the second extraction stage to allow the method to operate efficiently, in particular, but not limited to, in cold climates, such as during the day and in cold climates where there are large temperature variations across seasons.

The present application belongs to the technical field of lithium battery recycling, and provides a mixed recycling process for waste lithium iron phosphate battery powder and ternary lithium battery powder. The present application uses waste lithium iron phosphate battery powder and waste ternary lithium battery powder as raw materials, and realizes efficient separation and recovery of valuable metal ions and graphite through processes of roasting and water leaching, one-stage organic acid leaching, two-stage organic acid leaching, acid dissolution, resin copper removal and the like, which is simple and environmentally friendly. The roasting process removes fluorine in the two kinds of waste battery powder, avoids corrosion and damage of fluorine to the autoclave in the subsequent high-pressure impurity removal process, improves the safety factor of the equipment, and increases the safety of the process. In addition, no other impurity removal auxiliary materials need to be added in the process, which greatly reduces the cost investment and increases the economic benefit.

A composition containing high levels of high specific activity copper-64 and a process for preparing the composition. The composition contains about 2 Ci to about 15 Ci of copper-64, with a specific activity of up to about 3800 mCi of copper-64 per microgram of copper. The process for preparing the composition includes irradiating a nickel-64 target with a low-energy, high-current proton beam and purifying the copper-64 from other metals by a process including ion-exchange chromatography or a process including a combination of extraction and ion-exchange chromatography.