236 results about "Copper chloride" patented technology

The application provides a kind of superfine copper powder and its preparation method and application, the preparation method of the above-mentioned superfine copper powder uses two-step liquid phase reduction method to prepare superfine copper powder, and improves process conditions, using dropwise feeding mode. Among them, the first step uses alkaline ascorbic acid solution to reduce copper chloride to cuprous chloride with narrow particle size distribution; the second step uses ferrous sulfate and sodium citrate as mixed reducing agent, and sodium citrate can also be used as a complexing agent, which helps to reduce the cuprous chloride to spherical, well-dispersed, uniform particle size distribution of superfine copper powder. At the same time, the raw materials used by the application are easy to obtain, the reaction process is mild, and organic solvents and toxic and hazardous reagents such as sodium borohydride and hydrazine hydrate are not needed, the preparation process has cost effectiveness, is friendly to the environment, and is suitable for industrial production.

The invention relates to the technical field of energy systems, in particular to a methane gradient utilization system based on SOFC (solid oxide fuel cell) and copper chloride circulation, comprising a methane reforming and SOFC power generation unit for converting methane fuel into electric energy and combusting anode tail gas to generate high-temperature flue gas; the copper-chlorine circulating hydrogen production unit is connected with a high-temperature flue gas pipeline of the methane reforming and SOFC power generation unit, heat energy of the high-temperature flue gas is used for driving a copper-chlorine thermochemical circulating reaction, and hydrogen is prepared by taking water as a raw material; and the waste heat power generation and recovery unit is connected with a cathode tail gas pipeline of the methane reforming and SOFC power generation unit and a tail gas outlet pipeline of the copper chloride circulation hydrogen production unit, and is used for carrying out power generation and heat supply on waste heat in a cascade recovery system. According to the system, grade alignment and gradient utilization of energy are achieved, high-temperature waste gas of the SOFC system is sequentially used for driving copper-chlorine hydrogen production, ORC power generation and hot water supply, and the comprehensive utilization efficiency of energy is remarkably improved.

A high-entropy nano-array for electrocatalytic nitrate reduction coupling waste plastic conversion is prepared by the following method: (1) immerse the nickel foam into a hydrochloric acid solution to remove the surface oxide layer and oil stains, rinse with deionized water / ethanol three times, and dry for subsequent use; (2) solid powders of sodium chloropalladate, platinum acetylacetate, nickel chloride hexahydrate, copper chloride dihydrate, silver trifluoroacetate and tungsten hexacarbonyl are poured into an N-N dimethylformamide solution, ultrasonic is used to dissolve the solid powders, then glacial acetic acid and the treated nickel foam are added to the above solution, and after ultrasonic, heating in an oven is carried out, after the reaction is completed, water and ethanol solution are used for alternate washing, and drying is carried out, and the high-entropy nano-array catalyst is obtained. A preparation method of a high-entropy nano-array for electrocatalytic nitrate reduction coupling waste plastic conversion is provided. The high-entropy nano-array has excellent electrocatalytic activity and stability.

The application discloses an iron / copper-porphyrin nanoparticle and a preparation method and application thereof, and the nanoparticle is prepared through the following steps: adding iron chloride, copper chloride, tetra(4-carboxyphenyl)porphyrin and benzoic acid into a reaction solvent N,N-dimethylformamide solution, uniformly stirring at room temperature, and reacting at high temperature; and after the reaction is completed, the iron / manganese-porphyrin nanoparticle is obtained through centrifugation and washing. The iron / manganese-porphyrin nanoparticle is prepared by using a brand-new method, the nanoparticle can be degraded in a glutathione solution and release iron ions and copper ions, is used for catalyzing hydrogen peroxide to be converted into a hydroxyl radical (•OH), and tetra(4-carboxyphenyl)porphyrin can generate singlet oxygen (O2) under 660 nm laser irradiation, and is expected to become a good nano-carrier for accelerating photodynamic therapy-chemical kinetic therapy. 1 O2).

The invention discloses a synthesis method of 5-(1H-pyrrole-1-yl)-2-mercaptobenzimidazole, which comprises the following steps: carrying out cyclization condensation reaction on o-phenylenediamine and thiourea in an acidic environment provided by hydrochloric acid to obtain 2-mercaptobenzimidazole; the preparation method comprises the following steps: carrying out nitration reaction on 2-mercaptobenzimidazole, sulfuric acid and nitric acid to obtain 2-mercapto-5-nitrobenzimidazole; the preparation method comprises the following steps: carrying out nitro reduction reaction on 2-sulfydryl-5-nitrobenzimidazole and hydrogen under the catalysis of nickel to obtain 5-amino-2-sulfydryl benzimidazole; the preparation method comprises the following steps: carrying out an N-alkylation reaction on 5-amino-2-mercapto benzimidazole and tetrahydro-2, 5-dimethoxyfuran under the catalysis of copper chloride to generate 5-(1H-pyrrole-1-yl)-2-mercapto benzimidazole, and carrying out a reaction on the 5-amino-2-mercapto benzimidazole and tetrahydro-2, 5-dimethoxyfuran to generate the 5-(1H-pyrrole-1-yl)-2-mercapto benzimidazole. The method disclosed by the invention has the outstanding advantages of mild and easily-controlled conditions, simple and convenient post-treatment, high yield, economy, environmental protection, suitability for large-scale production and the like, conforms to the green chemical development concept, and has important application value.

This invention relates to a method for preparing a nanozyme detection reagent for carbofuran residues in apples, belonging to the field of pesticide residue and food safety technology. Specific steps: (1) Prepare mesoporous polydopamine powder using polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer, dopamine hydrochloride, etc.; (2) Prepare a copper-manganese bimetallic carbon dot solution using citric acid, copper chloride, manganese chloride, and ethylenediamine; (3) Prepare the nanozyme detection reagent using the mesoporous polydopamine solution and the copper-manganese bimetallic carbon dot solution. Mesoporous polydopamine has a large specific surface area, providing numerous sites for carbon dot loading and effectively adsorbing carbofuran molecules. The copper-manganese bimetallic carbon dots give the nanozyme detection reagent good enzyme-like activity and generate pesticide concentration-dependent colorimetric and photothermal signals. This invention achieves mutual verification of dual-mode output signals, significantly improving detection reliability; and completes detection within 1.5 h.

The application relates to a supported cheap CuNi bimetallic catalyst and a preparation method thereof, which is prepared by uniformly mixing copper chloride and nickel chloride, adding a graphene oxide (GO) solution, neutralizing the mixed solution by using an alkali solution to adjust the pH value of the mixed solution, heating and stirring the mixed solution, dropwise adding a sodium borohydride solution and continuously stirring, cooling and ripening, then removing the upper solution, centrifugally treating and washing the lower precipitate for multiple times, and drying and crushing. The supported cheap bimetallic Cu1Ni1@rGO catalyst has a stable chemical structure, the dispersion of the nanoparticles can be improved by loading the metal on the graphene oxide, the catalyst has high catalytic activity, stability and catalytic efficiency when being used in the hydrogenation reduction reaction of nitrile and the like, and the recyclable use rate of the catalyst in the reaction can be improved.

The application discloses a preparation method of a photocatalyst for CO2 reduction and application thereof. The photocatalyst is prepared through the following steps: first, preparation of the photocatalyst bismuth oxysulfate; second, metal loading modification of the photocatalyst bismuth oxysulfate. Thiocyanic acid and bismuth nitrate are used as raw materials to synthesize the photocatalyst bismuth oxysulfate, and copper chloride or silver nitrate reagent is selected as a material for metal loading modification of the bismuth oxysulfate, and the selected materials are inexpensive and easy to purchase, and the economic cost is low. The photocatalyst prepared by the method has the advantages of high selectivity, can accelerate electron movement under light conditions, promotes CO2 reduction degradation, and has high stability, and is an ideal photocatalyst. Compared with existing photocatalyst materials, the material has high catalytic degradation reducibility and selectivity, high stability, and when used as a CO2 photocatalyst, can efficiently reduce and convert CO2 into multi-carbon products.

The application belongs to the technical field of zinc ion batteries, and specifically discloses a zinc negative electrode and application of the zinc negative electrode in a zinc ion battery, wherein the zinc negative electrode comprises zinc material, the surface of the zinc material is coated with a protective layer, the protective layer is composed of a heterojunction material, a binder and an organic solvent, the mass ratio of the heterojunction material, the organic solvent and the binder is 7:2:1, the heterojunction material is a Cu2O / CuO heterojunction, the preparation method of the Cu2O / CuO heterojunction is as follows: taking alkaline copper chloride as a precursor and glucose as a reducing agent, the Cu2O / CuO heterojunction is generated in an alkaline hydrothermal system through one-step reaction, and then the Cu2O / CuO heterojunction is purified through hot water washing, the heterojunction material contains oxygen vacancies at the Cu2O / CuO interface, and the heterojunction interface forms a built-in electric field and a band bending. 2+ The Cu2O / CuO heterojunction protective layer of the application is driven by a built-in electric field, is functionalized by oxygen vacancies, and is self-aligned by a band, and the above-mentioned three mechanisms are synergized, so that the Zn 2+ full-path fast transportation, which is significantly better than existing single-phase or physical mixed protective layers.

The application relates to the technical field of electrocatalysis, in particular to an Ag@AgCl / Cu2O double-shell structure nanowire catalyst, a preparation method thereof, an electrode and a preparation method thereof and application. The preparation method of the Ag@AgCl / Cu2O double-shell structure nanowire catalyst comprises the following steps: 1) uniformly mixing sodium chloride, ferric nitrate, polyvinylpyrrolidone and silver nitrate in ethylene glycol, reacting at 120-140 DEG C for 20-50 min, and obtaining a suspension; 2) uniformly mixing the suspension prepared in the step 1) with copper acetate and polyvinylpyrrolidone in ethylene glycol, then reacting at 120-140 DEG C, then uniformly mixing with copper chloride, and reacting at 120-140 DEG C, and then carrying out solid-liquid separation. The Ag@AgCl / Cu2O double-shell structure nanowire material prepared by the application can be widely used in the field of electrochemical energy storage devices for electro-reducing carbon dioxide.

The application discloses a kind of high-activity polyphenol oxidase and preparation method thereof, belong to nano mimic enzyme synthesis technical field.The polyphenol oxidase of the application is with copper ion as active center, 2-methyl imidazole and guanylate disodium as organic ligand.Preparation method thereof includes the following steps: guanylate disodium solution is added to copper chloride solution under stirring condition, to obtain first mixed solution;First mixed solution is slowly added to 2-methyl imidazole solution under stirring condition, to obtain second mixed solution;Second mixed solution is centrifuged after ultrasonic at room temperature, to obtain brown precipitate, and the polyphenol oxidase is prepared by washing and drying brown precipitate.The mimic enzyme prepared by the application has higher catalytic performance, better stability and feasibility of large-scale preparation compared with natural enzyme, and will have broad application prospect in the field of biosensor.

The invention discloses a copper cyanoaurate hexagonal sheet loaded cuprous oxide material as well as a preparation method and application thereof. The copper cyanoaurate hexagonal sheet loaded cuprous oxide material comprises a copper cyanoaurate hexagonal sheet and cuprous oxide loaded on the copper cyanoaurate hexagonal sheet. According to the preparation method, copper ammonium chloride and potassium cyanoaurate are taken as raw materials, a copper cyanoaurate hexagonal sheet is prepared by a hydrothermal method, and then cuprous oxide is loaded on the copper cyanoaurate hexagonal sheet, so that the copper cyanoaurate hexagonal sheet loaded cuprous oxide material is obtained. The invention provides application of the copper cyanoaurate hexagonal sheet loaded cuprous oxide material as a catalyst for electrocatalytic reduction of carbon dioxide, and provides a gas diffusion electrode, and the catalyst in the gas diffusion electrode is the copper cyanoaurate hexagonal sheet loaded cuprous oxide material. The preparation process is simple and environment-friendly; the prepared material has higher ethylene selectivity and stability in the reaction of electrocatalytic reduction of carbon dioxide.

The invention discloses a copper slag derived microsphere composite catalyst which is prepared by the following steps: crushing and screening dried copper slag, mixing copper chloride and the copper slag, adding the mixture into an oxalic acid solution, uniformly stirring and mixing to obtain slurry, dropwise adding the slurry into silicone oil, stirring to form balls, aging at 55-65 DEG C for 12 hours, collecting the balls, and calcining at 500-600 DEG C for 2-4 hours to obtain the copper slag derived microsphere composite catalyst. And putting the calcined product into a thioacetamide-ethylene glycol solution, uniformly mixing, carrying out a hydrothermal reaction at 150-170 DEG C for 12 hours, carrying out solid-liquid separation, and drying the solid, the catalyst disclosed by the invention shows excellent PMS activation and degradation effects on oxytetracycline hydrochloride, tetracycline hydrochloride, chlortetracycline hydrochloride, methylene blue and methyl orange; the invention provides a new solution for solving the problem of secondary pollution caused by the copper slag and the problem of water environment pollution caused by antibiotic organic pollutants.

The application discloses a kind of genetic engineering escherichia coli plasmid expression culture medium and fermentation process, including basic medium and feed medium;The basic medium includes glycerol, yeast hydrolysate, yeast peptone, L-glutamic acid, L-valine, L-isoleucine, arginine, tyrosine, lysine, proline, glycine, ammonium sulfate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, citric acid, magnesium sulfate, ferrous sulfate, zinc sulfate, calcium chloride, manganese chloride, cobalt chloride, copper chloride, sodium ethylenediaminetetraacetate;Feed medium includes glycerol, citric acid, magnesium sulfate, ferrous sulfate, zinc sulfate, calcium chloride, manganese chloride, cobalt chloride, copper chloride, sodium ethylenediaminetetraacetate.The application inhibits the accumulation of harmful metabolites, and creates the optimal intracellular environment for stable replication of plasmid.In industrial fermentation scale, the amount of plasmid harvested per liter of fermentation broth is more than 1 gram, and the supercoiling ratio of plasmid DNA is stably maintained at more than 90%, with minimal batch-to-batch variation.

The invention relates to the technical field of environmental remediation, and particularly provides a bifunctional copper-based coordination polymer photocatalyst as well as a preparation method and application thereof.The bifunctional copper-based coordination polymer photocatalyst is prepared from copper chloride dihydrate, 4, 4 '-bis (3-pyridinecarboxamide) diphenyl ether and benzoic acid as main raw materials by adjusting reaction parameters. And reacting in a hydrothermal kettle to generate the bifunctional copper-based coordination polymer photocatalyst {[Cu2 (3-padpe) 2Cl2]. H2O} n. The method has the characteristics of simple process, low cost, high catalyst activity, good stability, reusability and the like, shows good application potential in repairing water bodies and soil polluted by organic matters and heavy metals, and provides a new research thought and insight for development of a novel multifunctional environment repairing agent.

The invention discloses a method for synthesizing biphenol in a water phase, belongs to the technical field of fine chemical engineering, and aims to solve the explosion safety risk caused by the use of an organic solvent in the conventional alkylphenol oxidative coupling process. According to the method, a phase transfer catalysis system composed of boric acid, Tween-80, dodecylphenol polyoxyethylene ether and copper chloride is adopted, water serves as a solvent, oxygen or air is introduced at the temperature of 60-90 DEG C, alkyl phenol is subjected to an oxidative coupling reaction to generate alkyl biquinone, and then biphenol is prepared through hydrogenation reduction. The method thoroughly avoids the use of an organic solvent, eliminates the hidden danger of explosion from the source, and has the advantages of high intrinsic safety, environmental friendliness and low cost.

The application discloses a combustion-supporting and corrosion-preventing type colloidal magnesium-based heavy oil additive and a preparation method thereof. The heavy oil additive is prepared from the following components in parts by weight: magnesium oxide 50-80 parts, bentonite 10-15 parts, lime powder 5-10 parts, nano silicon dioxide 10-15 parts, basic copper chloride 5-10 parts, diaspore powder 10-15 parts, sodium dodecyl benzene sulfonate 2-8 parts, hydrocarbon solvent 2-8 parts, combustion-supporting dispersant 2-8 parts, and water 80-100 parts. The additive can inhibit the combustion of sulfur in the heavy oil to generate sulfur oxides, low-temperature sulfur corrosion and the synergistic corrosion of HCl. In the low-temperature section, the basic components such as lime powder react with HCl to generate salt compounds, neutralize the acidic substances in the flue gas, and significantly increase the pH value to above 8, thereby preventing the low-temperature dew point corrosion of the tail heating surface.

The invention discloses a supported bimetallic complex catalyst for synthesizing isovanillin and a preparation method and application thereof.The catalyst is composed of an inorganic porous carrier and an active component supported on the inorganic porous carrier, and the active component is a bimetallic complex formed by Cu, Co and 1, 10-phenanthroline; the inorganic porous carrier is an SBA-15 molecular sieve or amino-modified Fe3O4 (at) SiO2 magnetic nanoparticles with a core-shell structure. The catalyst is prepared from a metal salt, a ligand and a carrier in a solvent through a coordination-loading one-step method. The catalyst disclosed by the invention is applied to one-step synthesis reaction of isovanillin by taking heliotropin and sodium methoxide or potassium methoxide as raw materials, and shows extremely high catalytic activity and product selectivity (yield gt; and by virtue of the load-type characteristic, especially the application of the magnetic carrier, rapid magnetic separation and recovery and repeated recycling can be realized, so that the catalyst is obviously superior to a traditional homogeneous copper chloride catalytic system, and has the potential of simple steps, environment friendliness and suitability for industrial production.

The utility model discloses a sealing corrosion testing device for a corrosion-resistant magnetic fluid, and relates to the technical field of testing devices. The sealing corrosion testing device for the corrosion-resistant magnetic fluid comprises a testing cylinder, and the interior of the testing cylinder is filled with the magnetic fluid; the spraying assembly comprises a rotating rod which is rotationally arranged on the inner top wall of the testing cylinder and extends to the upper surface of the testing cylinder, and a cylindrical cavity is formed in the rotating rod. By arranging the spraying assembly and the pressurizing box, when the device is used for testing the corrosion resistance of the magnetofluid, the magnetofluid can be more fully contacted with a salt mist solution containing copper ions in the testing process, and the salt mist solution containing the copper ions, which contains 5 percent (+ / -0.5 percent) sodium chloride and 0.26 g / L (+ / -0.02 g / L) copper chloride, can induce corrosion, so that the corrosion resistance of the magnetofluid is improved, and the corrosion resistance of the magnetofluid is improved. The corrosion speed is eight times higher than that of a common salt mist solution, so that the test period is effectively shortened, and the test efficiency is improved.

The invention provides a reflective integrated electrochromic device. The reflective integrated electrochromic device sequentially comprises a first substrate layer, a working electrode layer, an integrated electrochromic layer, a counter electrode layer and a second substrate layer, the integrated electrochromic layer comprises a metal source compound; the metal source compound is selected from silver chloride, silver acetate, silver nitrate, silver perchlorate, silver sulfate, silver cyanide, silver sulfide, silver hexafluorophosphate, silver tetrafluoroborate, silver tetrachloroaluminate, silver trifluoromethanesulfonate, silver bis (trifluoromethane sulfonimide), copper fluoride, copper chloride, copper cyanide, copper sulfate, copper acetate, copper aluminate, cuprous fluoride, cuprous chloride, cuprous cyanide, gold chloride and gold cyanide; the catalyst is one or more of gold sulfide, gold chloride, gold (II) sulfide, nickel chloride, nickel sulfate, cobalt chloride and platinum chloride. The device has a relatively large transmittance / reflectivity dynamic change range, can perform light and heat management at the same time, and can keep a stable coloring or fading state for one month or even several months under a no-load condition.

The preparation method comprises the following steps: dissolving dopamine in a Tris buffer solution to form a dopamine prepolymer solution, adding ferric chloride and copper chloride, carrying out constant-temperature water bath to obtain a black suspension, centrifuging, carrying out suction filtration, washing, collecting a filter cake, and carrying out freeze drying to obtain the bimetallic doped polydopamine adsorbent. The composite adsorbent, namely the bimetallic doped polydopamine adsorbent, is obtained. Compared with the traditional adsorbent, the method for treating the humic acid by using the polydopamine coated iron ion and copper ion composite adsorbent has the advantages that the selected preparation materials are low in price, safe and non-toxic; meanwhile, the composite adsorbent obtained by the invention has wide range of pH applicability, and the regeneration process of the adsorbent is easy to operate.

This invention discloses a method for preparing hollow metal sulfides based on a mild template method using calcium carbonate. Calcium chloride powder and potassium carbonate powder are uniformly dispersed separately in an alcohol solution. The two solutions are then mixed and allowed to stand for aging to obtain solution A. Simultaneously, thioacetamide is dissolved in the alcohol solution to obtain solution B, and a chloride is dissolved in the alcohol solution to obtain solution C. The chloride is either stannous chloride or copper chloride. Then, solutions B and C are added sequentially to solution A at a molar ratio of thioacetamide to chloride of 2:1 and mixed uniformly to obtain solution D. Solution D is then placed in a polytetrafluoroethylene (PTFE) reactor and reacted at 140–180°C for 12 hours. Carbon dioxide is then continuously bubbled through the reactor for 2–3 hours. The mixture is filtered and washed with water and ethanol to obtain the hollow metal sulfides. This invention can obtain hollow metal sulfides with different morphologies and avoids the contamination problems associated with high-temperature calcination or acid dissolution for template removal.

This invention discloses a high-temperature conductive graphene solution and its preparation method, comprising the following components by weight: 1800-2000 parts of a dispersion containing 3-5 nm graphene quantum dots, wherein the quantum dot content is 5-10 wt%; 450-510 parts of tin dioxide with a particle size ≤0.2 μm; 15-20 parts of ammonium tungstate and 15-20 parts of lanthanum oxide; 30-40 parts of manganese chloride tetrahydrate, 20-30 parts of nickel chloride, and 20-30 parts of copper chloride; 8000-10000 parts of a solvent system, wherein deionized water ≤4000 parts, anhydrous ethanol ≤5000 parts, isopropanol ≤100 parts, and n-butanol ≤50 parts; 800-1000 parts of tri-n-butyltin hydride and 100-300 parts of citric acid. Due to the adoption of the above technical solutions, this application has achieved breakthroughs in the stability of conductive networks through quantum dot bridging mechanisms; the standard deviation of electron migration path length has been reduced from 1.2 μm to 0.08 μm; the heterojunction interface has been optimized and a Type-II band structure has been formed, resulting in an 82% reduction in contact resistance.

The utility model relates to the field of electrochemistry, in particular to a spiral-flow type cation exchange membrane electrolysis device, which is a spiral-flow type electrolysis device for realizing conversion electrolysis of different solution systems by utilizing the characteristic that a cation exchange membrane has selective permeation on cations. Comprising a cathode cylinder, a cation exchange membrane anode, an upper cover, a lower cover, a starting sheet, a cathode region rotational flow lower liquid inlet device, a cathode region rotational flow upper liquid outlet device, an upper starting sheet pressing ring, a lower supporting isolating ring, a sealing assembly and an anode positioning rod. The device is suitable for mutual migration and conversion of cations among a chlorination system, a sulfuric acid system, a nitric acid system, a sulfamic acid system, a phosphoric acid system, a thiourea system and a cyanide system, so that the problem that an original system cannot be normally electrolyzed is solved from the source, and the application range of an electrolysis process is expanded; the method is particularly suitable for efficient metal copper electrolysis when a copper chloride solution system is converted into a copper sulfate solution system.

A method for preparing and applying copper chloride-modified vinegar residue biochar, belonging to the field of wastewater treatment technology, is disclosed. The method involves: weighing 1.0000 g ± 0.0005 g of vinegar residue powder and adding it to 40 mL of ultrapure water, dispersing it thoroughly under magnetic stirring; then adding 0.5000 g of CuCl₂·2H₂O, mixing, and continuously stirring magnetically at room temperature for 24 h to allow the CuCl₂ to form a biochar. 2+ The mixture is thoroughly impregnated with vinegar residue to form a mixture. The mixture is then dried in an oven and transferred to a tube furnace. Inside the tube furnace, under a N₂ atmosphere, the temperature is increased to 600°C at 8°C / min and pyrolyzed for 120 min. After cooling, the product is removed, ground, and then copper chloride-modified vinegar residue biochar is obtained. This invention features a simple process flow, controllable operating conditions, low equipment requirements, good repeatability, and suitability for large-scale preparation. The obtained copper chloride-modified vinegar residue biochar exhibits excellent adsorption and degradation performance of organic pollutants, particularly efficient degradation and removal of quinolone antibiotics such as ciprofloxacin and norfloxacin.

The invention belongs to the field of pharmaceutical preparations, and relates to a multi-trace element injection and a preparation method thereof. The multi-trace element injection comprises effective components, a stabilizer and water, the effective components comprise chromium chloride, copper chloride, ferric chloride, manganese chloride, sodium molybdate, sodium selenite, zinc chloride, potassium iodide and sodium fluoride, and the stabilizer comprises xylitol, a pH regulator and an additive; and the additive is PEG (Polyethylene Glycol) 400 or PEG 600. The multi-trace element injection provided by the invention can effectively inhibit the loss of iodine in the sterilization process, and the stability, economical efficiency and production controllability of the multi-trace element injection are fundamentally improved.

This invention relates to the field of nanomaterial preparation, specifically disclosing a method for preparing copper nanowires, comprising the following steps: (a) dissolving copper chloride dihydrate in deionized water; (b) adding glucose, sodium borohydride, and hexadecylamine, mixing for a period of time until a sky-blue suspension is obtained; (c) reacting at a certain temperature for a period of time; cooling to room temperature, and washing to obtain the copper nanowires. This invention also discloses the copper nanowires.

The invention discloses a method for resource utilization of copper-containing waste etching liquid and production of high-purity copper hydroxide, and belongs to the field of green cyclic recycling of copper-containing waste liquid. The method for preparing the high-purity copper hydroxide by using the copper-containing etching waste liquid comprises the following steps: mixing the copper-containing etching waste liquid with a crystal form inducer solution, adjusting the pH value to 3.0-8.0, then reacting, carrying out solid-liquid separation to obtain a solid-phase separated substance and filtrate, and carrying out aging treatment on the solid-phase separated substance to obtain a basic copper chloride precipitate; and adding ammonia water and a crystal form transforming agent into the basic copper chloride precipitate, then carrying out aging treatment, and carrying out solid-liquid separation to obtain the high-purity copper hydroxide powder. The prepared copper chloride hydroxide and copper hydroxide powder are large in particle size, the average particle size of the copper chloride hydroxide collection substance is 20-200 microns, and the average particle size of the copper hydroxide powder is 10-100 microns.

This invention relates to the field of printed circuit board manufacturing technology and discloses a fine etching process for PCB circuit patterns. The process includes injecting a fine etching composition comprising deionized water, hydrochloric acid, copper chloride dihydrate, anhydrous magnesium chloride, p-toluenesulfonic acid monohydrate, polyethylene glycol, and 2-mercaptobenzimidazole into a circulating working tank of an etching machine; setting the temperature of the working solution in the circulating working tank; sending the substrate to be etched, after dry film development, into a spray section; activating the spray array and setting the spray pressure to etch the substrate; and rapidly rinsing the etched substrate in a deionized water washing section, followed by strong air drying to obtain the circuit pattern. This invention reduces surface tension through specific components to promote solution penetration into the microstructure, utilizes an organic corrosion inhibitor to form a stable protective layer on the trench sidewalls, and combines the vertical impact of the nozzle jet on the bottom, leveraging the difference between mechanical force and chemical adsorption force to achieve anisotropic etching, thus suppressing lateral corrosion of fine circuits.

This invention provides a PVP-doped Cu-Mg binary metal electrocatalyst material, its preparation method, and its application. The method includes the following steps: dissolving copper chloride, polyvinylpyrrolidone, and magnesium chloride in N,N-dimethylformamide to obtain a mixed solution; the molar ratio of copper chloride to magnesium chloride is 1:0.98–1.02; stirring the mixed solution under ice-water bath conditions while introducing a protective gas, adding sodium borohydride solution dropwise to generate a precipitate, separating, washing, and drying the precipitate to obtain the PVP-doped Cu-Mg binary metal electrocatalyst material. This invention effectively regulates the formation of Cu by incorporating magnesium and controlling its doping amount, combined with PVP. + The valence state of Cu improves the selectivity of C2 products, while the outer PVP coating protects Cu. + Not oxidized to Cu 2+ This effectively improves the stability of the material.