30results about "Copper compounds preparation" patented technology

The invention relates to the technical field of industrial wastewater treatment, in particular to feed-level copper sulfate and a production technology thereof. The production technology comprises the following steps of A, preparing rough purification etching waste liquid; B, neutralizing, pressing and filtering; C, extracting, and exchanging ions; D, acidifying and crystallizing. The production technology has the advantages that the environment-friendly and pollution-free effects are realized, the emission of waste gas and wastes is avoided, and the wastes are utilized; the mother liquor is recycled, and the subsidiary liquor is sold back to enterprises, so that the economic benefit is high; the equipment is simple, and the operation is simple and convenient; the content of copper ions in the prepared feed-level copper sulfate is 95%, and the prepared feed can improve digestion systems of livestock and poultry.

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 ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.

The present process provides a method for synthesizing difficult to make oxide-free nanometals and such as Zn, Sn and Ti and alloys of the period 4 and 5 transition metal elements in a free and reduced state using a solution phase synthesis process. Also provided is a method for stabilizing their associated colloidal metal and alloy dispersions under kinetic control at modest temperatures (<80 degrees Celsius). A solution of an organic reducing agent containing at least two proximal nitrogen atoms is reacted with a separate solution containing one or more metal-organic salts dissolved in the same or different low molecular weight solvent as the reducing agent. The reaction products are stabilized with Lewis bases and Lewis acids and optionally can be concentrated by removing a portion of the volatile low molecular weight solvent by either the use of a partial vacuum or by chemical extraction into another phase.

The invention provides a preparation method of electroplating copper sulfate. The method comprises the following steps: taking acid copper waste water as a raw material, adsorbing organic matters in the acid copper waste water by chelating resin, adopting selective copper cation resin to adsorb copper ions in the acid copper waste water, adding strong acid to perform desorption for the selective copper cation resin, regenerating to obtain a concentrated copper sulfate solution, adding hydrogen peroxide into the concentrated copper sulfate solution, successively performing weak electrolysis, filtering, pH value adjustment and crystallization for the concentrated copper sulfate solution with hydrogen peroxide, and obtaining copper sulfate crystals. By adopting the preparation method of the electroplating copper sulfate of the invention, the prepared copper sulfate crystals are exquisite, the water content is little, the purity is high and can reach 99.9 percent or higher, the waste wateremission and treatment cost can be reduced, and environmental protection and emission reduction can be realized.

The present process provides a method for synthesizing oxide-free copper nanometal dispersion in a free and reduced state using a solution phase synthesis process. A solution of an organic reducing agent containing at least two proximal nitrogen atoms is reacted with a separate solution containing a copper salt reformulated into a charge transfer complex. The reaction products are stabilized with Lewis bases and Lewis acids and optionally can be concentrated by removing a portion of the volatile low molecular weight solvent by either the use of a partial vacuum or by chemical extraction into another phase.

The invention discloses a method for fully recycling anions and cations from microetching waste liquid. The method comprises the following steps: (1), adjusting the pH value of the microetching wasteliquid to be treated to 2.5-3.5; (2), extracting the microetching waste liquid by using extracting equipment to produce a raffinate, washing water and copper-rich liquid; (3), mixing the washing waterwith the raffinate, and then performing cotton core filtration, activated carbon filtration and ion exchange resin filtration to remove waste organic matters and intercept residual heavy metal ions to obtain a colorless ammonium sulfate solution; (4), then, crystallizing through evaporative concentration under negative pressure and at low temperature to produce ammonium sulfate crystals; and (5),finally, performing evaporative concentration under negative pressure and crystal growth to produce granular copper sulfate pentahydrate crystals. According to the method, liquid operation is performed and a precipitate filtration need is avoided in the whole process, a requirement on almost no residual copper ions in the raffinate can be met, the quality of the product crystallized copper sulfate can reach an electroplating pure grade index, the anionic sulfate is finally produced in the form of ammonium sulfate, and the demand on an ammonium sulfate product in the national standard is met.

The invention discloses a preparation method of high-purity copper chloride dehydrate. According to the method, hydrochloric acid is added into a basic copper chloride solution for regulating the pH to be 2 to 4; hydrogen peroxide is added; reaction liquid is heated and boiled; chlorides of Al, Bi and Fe are added; basic copper chloride and/or copper oxide are/is used for regulating the pH to be 6.5 to 7.5; filtering is performed; activated charcoal is added into filtrate; heat insulation stirring is performed at 90 to 100 DEG C for 0.5 to 5h; then, filtering is performed; hydrochloric acid is used for regulating the filtrate until the pH is 2 to 3; concentration and crystallization are performed to obtain the high-purity copper chloride dehydrate. The preparation method has the advantages that the operation is simple; the cost is low; the environment-friendly effect is achieved; the purity of the prepared copper chloride dehydrate is high; the impurity metal ion content reaches to ppb grade.

The invention discloses a hollow Cu7S4 nano cubic structure and a preparation method and application thereof. The side length of the hollow Cu7S4 nano cubic structure is about 70-80 nm, and the shape of the hollow Cu7S4 nano cubic structure is a hollow nano cubic structure. The preparation method comprises the following steps: dissolving polyvinylpyrrolidone in water, then adding cupric acetate, sodium hydroxide and ascorbic acid, performing stirring, performing heating in an oil bath, adding sodium sulfide for continuous reaction, and after the reaction is completed, centrifugally washing and dispersing the product. The prepared hollow Cu7S4 nano cubic structure has good stability and biocompatibility, has large absorption in a near-infrared region 900-1100 nm, is high in photothermal conversion efficiency, provides conditions for photothermal therapy of tumor cells, and is simple in preparation method, mild in conditions, environmentally friendly and suitable for industrial production. Meanwhile, due to the fact that large holes exist in the surface of the material, the material can be more efficiently applied to preparation of photothermal therapy reagents for treating cancers.

The present invention relates to a copper precipitation method by iron modification and to a copper precipitation and preparation apparatus used for the method, wherein in the copper precipitation method, iron is put into an acidic solution to attain iron ionization, and then a copper-containing acidic solution is put thereinto and hydrogen as an accelerator is added thereto, thereby artificiallymodifying iron elements into copper elements, and herein, a large amount of copper can be precipitated using iron, thereby obtaining the same economic effect as obtaining copper mines.

Provided is a method for inhibiting extractant degradation by a diluent and an extractant input manner, the method including steps of: (a) determining and analyzing the total volume of the DSX solvent when the diluent and the extractant, which are the DSX solvents, are added in the DSX process and identifying the concentration of the extractant; (b) calculating an extractant concentration according to an amount of the diluent to be added based on the analysis value of step (a), and then adding the extractant; (c) determining the ratio between the extractants through analysis after adding the extractants; (d) adding the extractant to be needed when the ratio between extractants is out of the range; and (e) adding the diluent and analyzing the ratio between the extractants.

The invention relates to a method for preparing nano cuprous oxide by taking a copper-containing waste mobile phone circuit board as a raw material. The method comprises the following steps: 1) heating, stirring and dissolving crushed and ground powder of the waste mobile phone circuit board by using dilute nitric acid, and filtering to obtain an acid leaching solution; (2) uniformly mixing an oil-phase component surfactant Span80, a carrier Lix984, liquid paraffin and a membrane solvent kerosene, and then adding an isometric ascorbic acid solution while stirring at a high speed to obtain an emulsion; and 3) diluting the acid leaching solution with water, adjusting the pH value to 7-9, adding the emulsified liquid, stirring, then transferring into a separating funnel, separating, and standing. And 4) transferring the upper-layer emulsion to a centrifuge tube, adding absolute ethyl alcohol, centrifuging, washing, evaporating ethyl alcohol from a solid containing a small amount of ethyl alcohol to obtain the product nano cuprous oxide, and recovering the ethyl alcohol. The method is simple in process, low in recovery cost, environmentally friendly and reliable in quality.

The invention belongs to the technical field of waste incineration fly ash treatment, and particularly relates to a resource utilization method of waste incineration fly ash. According to the method provided by the invention, soluble salt and magnetic substances in the waste incineration fly ash can be synchronously separated through washing, washing slag is subjected to second washing when the pH value is 6.5-8.0, and second washing slag is subjected to third washing when the pH value is 0.6-1.5. And step-by-step washing is carried out by controlling different pH values, and all extractable components in the garbage fly ash are respectively concentrated in different sections of washing liquid. According to the method, calcium salt and industrial salt extraction is carried out on the washing filtrate, calcium and heavy metal extraction is carried out on the second washing liquid and the third washing liquid, the final slag is used as a substitute raw material for building material preparation after high-temperature sintering or is directly prepared into building materials, and meanwhile dioxin is thoroughly decomposed during high-temperature treatment. According to the method provided by the invention, the garbage fly ash is completely recycled.

The present invention relates generally to a process for recovering copper and other metal values from metal-containing materials through pressure leaching operations. In accordance with the various aspects of the present invention, metal-containing pregnant leach solutions from pressure leaching operations need not be significantly diluted to facilitate effective metal recovery using solvent extraction and electrowinning.

The copper oxide nanoparticles synthesized using Rhatany root extract involves preparing the Rhatany root extract by adding powdered Rhatany roots to boiling water, allowing the mixture to soak overnight, and removing any solid residue by filtering to obtain the aqueous extract. The copper oxide nanoparticles are prepared by mixing equal volumes of the aqueous Rhatany root extract and 0.1 M aqueous copper sulfate, heating the mixture at 80° C. for 40 minutes, and adding 1 M sodium hydroxide dropwise to the mixture to precipitate CuO. The precipitate is removed by centrifuge, washed with ethanol, dried, and calcined at 400° C. for 4 hours to obtain the copper oxide nanoparticles. The resulting nanoparticles proved effective in degrading wastewater dyes, showed anticancer activity against human cervical cancer by cell viability assay, and showed antibacterial activity against various strains of bacteria by agar diffusion.

The invention provides an alkaline etching ammonia recycling system. The system comprises the following steps of adding sulfuric acid solutions of different concentrations as reverse extraction agentsinto three containers; performing reaction on alkali-phase solutions added with the sulfuric acid solutions of different concentrations to obtain a copper sulfate solution at the reaction temperatureof 10 DEG C-60 DEG C; leaving the copper sulfate solution subjected to cooling at room temperature to obtain a solution containing crystalline copper sulfate; and adding ammonia and ammonium chlorideinto a reaction kettle, and then heating the temperature and stirring the mixer so as to obtain an alkaline etching liquid. According to the alkaline etching ammonia recycling system, a method of extraction is adopted to divide the alkaline etching liquid into an aqueous phase and an alkali phase for separated treatment; and while the aqueous phase is used as a regeneration resource of a new etching liquid, the alkaline liquid is subjected to effects of extraction and reverse extraction, copper resource within is recycled, and during the process of recycling, all waste liquid is regenerated,no wastewater is discharged, and therefore the purpose of saving through resource recycling and re-utilization is achieved, and energy consumption is reduced as well.

The invention relates to an improved copper sulphate production technology. The production technology comprises the following steps: grinding copper sponge to 50-70 meshes, reacting the copper sponge and a high acid solution at temperature of 50 DEG C to prepare a solution containing 95-100 g/L of copper ions; adding a sulfuric acid solution in the solution, diluting the materials to the copper ion content of 55-59 g/L, then employing an organic extractant for extracting the solution, wherein the volume ratio of the organic reagent to a water phase is 5:1; adding hydrochloric acid in the extract for washing, adjusting the pH value to 2.5-3.5; using industrial diluted sulfuric acid for performing back extraction on an organic phase, controlling the copper content in strip liquor to no greater than 80 g/L; splitting the phase, using fiber microspheres to remove oil of the strip liquor, concentrating the strip liquor to obtain concentrated liquid with copper content of 230 g/L, and performing concentrate and crystallization on the solution to obtain the copper sulphate product. The production technology can greatly reduce the content of other impurity in the final product, can repeatedly reuse the used reagent, and reduces the production cost.