14results 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.

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.

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 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

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.