883 results about "Copper sulfate" patented technology

The invention belongs to the technical field of stainless steel surface treatment, and particularly relates to a stainless steel passivation solution and a preparation method thereof. The water-based cutting fluid is prepared from the following raw materials: cerium salt, copper sulfate, citric acid, sodium dihydrogen phosphate, ammonium molybdate, sodium tungstate, aminated-silane modified SiO2 nanoparticles, polyethylene glycol, L-ascorbic acid, polyaspartic acid, an anti-settling agent, a surfactant and the balance of deionized water. According to the invention, a three-dimensional network skeleton is constructed by using aminated-epoxy group silane modified SiO2 nanoparticles, so that the problem of weak interface bonding force of a traditional passivation layer is solved; according to the formula, the proportion of biodegradable components such as citric acid and polyaspartic acid is extremely high, cerate adopts a low-toxicity rare earth compound, molybdenum / tungsten elements are fixed in a stable oxide form, the dosage of EDTA is remarkably reduced through a compounding technology, residual ions are adsorbed in combination with a three-dimensional network, and the balance of environment friendliness and long-acting corrosion resistance is achieved.

The invention discloses a carbon fiber-based solar photo-thermal conversion material as well as a preparation method and application thereof, relates to the technical field of solar photo-thermal conversion materials, and solves the problems of poor mechanical performance and photo-thermal conversion performance of an existing photo-thermal conversion material. The preparation method comprises the following steps: thermally mixing a polyvinyl alcohol sodium alginate mixed solution, a graphene oxide solution and a cross-linking agent aqueous solution to prepare a cross-linking precursor solution; the preparation method comprises the following steps: by taking a carbon felt as a substrate, injecting a crosslinking precursor solution into the substrate by utilizing a vacuum infusion process, infiltrating the carbon felt, performing aging crosslinking, and then performing directional freeze drying to obtain a modified carbon felt; preparing an electroplating solution by using copper sulfate, sodium potassium tartrate tetrahydrate, disodium hydrogen phosphate and formaldehyde, adjusting the pH value by using NaOH, growing copper on the surface of the modified carbon felt by using an electroplating process, and carrying out vacuum drying; and putting the modified carbon felt subjected to vacuum drying after electroplating into a tubular furnace to obtain the carbon fiber-based solar photothermal conversion material. The method has a wide application prospect in the field of seawater evaporation desalination.

The invention discloses a preparation method for selectively oxidizing thioether into sulfoxide through photo-initiation, and belongs to the field of synthesis of medical compounds. The preparation method comprises the following steps that in the air atmosphere, a thioether compound is dissolved in an acetonitrile-water mixed solvent, inorganic metal salt catalysts such as ferric chloride and copper sulfate are added, the mixture reacts for 8-48 h at the temperature of 0-45 DEG C under illumination with the wavelength of 295-405 nm, selective oxidation is carried out, and the sulfoxide product is obtained, and the molar ratio of thioether to the catalysts is 5: 1. The method overcomes the problems of excessive oxidation risk, complicated operation, environmental pollution and the like caused by dependence of a noble metal catalyst and use of a strong oxidant in the existing thioether oxidation method, has the advantages of high catalytic efficiency, high yield and excellent selectivity, can greatly reduce the production cost, is suitable for later industrial synthesis and amplification, and has wide application prospects. The method has the advantages of no expensive metal catalyst or oxidant, simple preparation process, high efficiency, environmental protection, safety and cost saving.

The invention provides a preparation method of a porous copper foil with a regular polygonal hole array, which comprises the following steps of: grinding and polishing a titanium plate until the titanium plate is matte, punching holes with the regular polygonal hole array in the titanium plate by laser, finely trimming vertex angles of the regular polygonal holes by laser, and polishing and grinding the titanium plate to obtain the porous copper foil with the regular polygonal hole array. The method comprises the following steps: preparing a titanium plate, cleaning with pure water and alcohol to obtain a clean titanium plate, preparing a copper sulfate electrolyte, adding a proper amount of a brightener, a wetting agent and a high resistance agent into the electrolyte, mixing, pouring the mixed solution into an electrolytic bath, putting the clean titanium plate and a carbon plate into the electrolytic bath, and carrying out electrolytic foil generation by taking the titanium plate as a cathode and the carbon plate as an anode; and after foil generation is finished, the copper foil is stripped from the surface of the titanium plate, and the porous copper foil with the regular polygon holes is obtained. According to the method, the holes of the titanium plate are the regular polygon holes, and the vertex angles of the regular polygon holes are finely trimmed, so that the copper foil of the electrolytic raw foil is not easy to adhere to the titanium plate during stripping, and the production yield of the copper foil is further improved.

The invention discloses a preparation method of a 3-micron ultrathin lithium battery copper foil. The preparation method comprises the following steps: preparing a copper sulfate electrolyte; a wetting agent, a brightening agent and a high resistance agent are added into the copper sulfate electrolyte, the high resistance agent is at least one of thiazolidinethione, polyethyleneimine, 2-mercaptobenzimidazole and ethylene thiourea, and a mixed additive is formed; polishing and grinding a cathode roller by adopting a flying wing wheel, and carrying out electrolytic treatment on the mixed additive through the polished and ground cathode roller to obtain a first-stage copper foil; and the first-stage copper foil is placed in a nitrogen furnace to be subjected to annealing treatment, and the 3-micron ultrathin lithium battery copper foil is obtained. The invention aims to solve the technical problems that in the prior art, edge tearing, foil breaking, warping, dark appearance oxidation and the like are prone to occurring in the production process of the ultrathin copper foil, the tensile strength and the ductility are difficult to consider at the same time, and stable mass production of the 3-micron copper foil is still difficult.

The invention discloses a synthesis process of vitamin C ethyl ether, and belongs to the technical field of vitamin C derivative synthesis. The process comprises the following steps: taking L-ascorbic acid as a raw material, adding acetone, anhydrous cupric sulfate and acetyl chloride, and reacting for 1-2 hours at 38-40 DEG C under the protection of nitrogen to obtain a vitamin C protector; adding alkali, water, an alkylating reagent and absolute ethyl alcohol into the reaction product, reacting for 3 hours at 75-78 DEG C under the protection of nitrogen, and performing reduced pressure distillation to obtain a vitamin C protector etherate; and finally, hydrolyzing by using cationic resin, removing a protecting group, and recrystallizing by using ethyl acetate to obtain the vitamin C ethyl ether. Through the synergistic catalysis of anhydrous cupric sulfate and acetyl chloride, the reaction time is remarkably shortened, and the product purity and yield are improved. Through detection, the product purity is more than 99.5%, the total yield can reach more than 80%, and an efficient and economical method is provided for industrial production of vitamin C ethyl ether.

The invention relates to the technical field of electrolytic copper foil processing, and particularly provides a method for reducing the rough surface roughness of an HVLP copper foil by using a composite additive, which comprises the following steps: step (1): enabling the composite additive to flow into a high-level tank through an additive flow pump, uniformly mixing the composite additive with a copper sulfate electrolyte, and enabling the mixture to flow into a crude foil machine; step (2), then adjusting process parameters of a crude foil machine, including current and line speed of a cathode roller; (3) foil generation and foil drawing are carried out; the composite additive comprises one or two of gelatin and collagen. One or more composite additives composed of gelatin, collagen, sodium dithiodipropane sulfonate, N, N-dimethyl-dithioformamide sodium propanesulfonate, 3-sulfydryl-1-sodium propane sulfonate, hydroxyethyl cellulose and polyethylene glycol are added into the raw foil electrolyte, so that the copper electrodeposition reaction potential can be effectively changed; and uniform and compact copper crystallization peaks are obtained, the rough surface roughness of the raw foil is reduced, and the uniformity of a plating layer is improved.

The invention belongs to the field of secondary resource recycling, and discloses a method for preferentially extracting lithium from a waste lithium iron phosphate battery positive electrode material through salt leaching, the waste lithium iron phosphate battery positive electrode material is leached by adopting a soluble chloride and metal sulfate mixed solution, and a lithium-containing leaching solution and ferrophosphorus slag are obtained, the soluble chloride solution is selected from at least one of a potassium chloride solution, an ammonium chloride solution or a sodium chloride solution, and the metal sulfate comprises at least one of ferric sulfate, copper sulfate and high-valence manganese sulfate. According to the method, the valuable metal is recycled from the waste lithium iron phosphate battery powder by adopting a novel salt leaching process, the use of a large amount of acid and alkali reagents in a conventional wet process is avoided, the whole recycling process is green, environment-friendly and low in cost, and the lithium-extracted liquid is recycled after being blended, so that the input cost of a production reagent is reduced, and the efficient utilization of the reagent is realized; no waste water is generated, and cleaning and environment-friendly effects are achieved.

The invention relates to the technical field of photocatalysis, and provides a preparation method of a copper-cuprous oxide-copper bismuthate ternary complex, which comprises the following steps: adding sodium bismuthate dihydrate, copper sulfate and sodium sulfite into a hydrothermal reaction kettle containing distilled water to obtain a solid-liquid mixture; and the solid-liquid mixture generates the copper-cuprous oxide-copper bismuthate ternary compound under a hydrothermal condition through a synergistic effect of a heterogeneous interface in-situ oxidation-reduction reaction of sodium bismuthate and a sodium sulfite solution and a homogeneous oxidation-reduction reaction of a copper sulfate solution and the sodium sulfite solution. The preparation method has the advantages that the elemental copper-cuprous oxide-copper bismuthate ternary compound is prepared by a one-pot method through cooperation of the out-phase interface in-situ oxidation-reduction reaction and the homogeneous oxidation-reduction reaction, and the preparation method is simple in preparation step, convenient to operate and easy to quantitatively control.

The invention discloses a nickel-iron alloy dissolving method which comprises the following steps: feeding a copper sulfate solution into a mixed feed liquid containing a first nickel-iron alloy and copper sulfate, carrying out primary replacement reaction to obtain copper-containing slag and a reaction liquid, maintaining c (Fe < 2 + >) / c (Cu < 2 + >) in the reaction liquid to be 50-90, and overflowing to obtain a nickel-iron-copper solution; wherein c (Fe < 2 + >) and c (Cu < 2 + >) are mass concentrations of Fe < 2 + > and Cu < 2 + > respectively, and the unit is g / L; and carrying out secondary replacement reaction on the nickel-iron-copper solution and a second nickel-iron alloy until the concentration of Cu < 2 + > in a liquid phase is lower than 5ppm, and carrying out solid-liquid separation to obtain a nickel-iron solution product and second copper-containing slag. According to the dissolving method of the ferro-nickel alloy, the recovery process of ferro-nickel in the ferro-nickel alloy can be simplified, the quality of the ferro-nickel solution is improved, the gas production phenomenon caused by acid dissolution is avoided, and the safety is higher.

The invention discloses preparation of a Tm-Cu-In < 2 > O < 3 > composite material, a gas sensor based on the Tm-Cu-In < 2 > O < 3 > composite material, a preparation method and application, and belongs to the technical field of gas sensor materials. Thulium chloride, copper sulfate, indium salt and an organic solvent are used as raw materials, In2O3 is doped with double metal elements Cu and Tm, a composite gas sensitive material is prepared, and a gas sensor based on the composite gas sensitive material is obtained. Compared with other In2O3-based H2S sensors, the gas sensor prepared by the invention has high sensitivity, high selectivity and good stability to H2S, and still has relatively high response in a high-humidity H2S environment, so that the gas sensor has excellent gas sensitivity to H2S gas in the environment. The sensor is simple in production process, low in energy consumption in the production process, low in cost and suitable for industrial batch production.

The invention relates to the technical field of catalyst processing, and discloses a high-activity transition metal phosphide electrolyzed water catalyst and a preparation method thereof, and the high-activity transition metal phosphide electrolyzed water catalyst comprises the following components by weight: 1-3 parts of cobalt chloride hexahydrate; 0.5 to 1.5 parts of ruthenium trichloride; 0.5 to 1.5 parts of iridium chloride (III) hydrate; 1-2 parts of copper sulfate pentahydrate; 2 to 4 parts of sodium hypophosphite; 1 to 2 parts of urea; 1 to 2 parts of glucose; 1-2 parts of sodium sulfide nonahydrate; 0.5 to 1 part of crystalline aluminum chloride; 50 to 100 parts of deionized water; and 0.1 to 0.5 part of hexadecyl trimethyl ammonium bromide. By introducing the plasma auxiliary treatment technology, the electronic structure of the catalyst is optimized, the conductivity and stability of the catalyst are improved, and the efficiency and durability of hydrogen production through water electrolysis are enhanced.

The present invention provides a method for preparing silver-coated copper powder, which relates to the technical field of metal powder preparation. This preparation method directly prepares a copper core by chemical reduction method, then uses electroless plating method to grow a silver layer on its surface, and finally uses jet milling to improve the density of the powder. In the present invention, reducing agents with different reduction effects are added twice to reduce copper sulfate, which reduces the initial reaction rate, makes the whole reaction stable, and improves the sphericity of copper crystal nuclei. At the same time, sulfate radicals in the reaction system can form silver sulfate precipitation with silver ions in the subsequent reaction, further slowing down the reduction rate of silver ammonia complex ions and enabling the dense growth of the silver layer. At the same time, the unreacted completely glucose remaining in the reaction system can continue to reduce silver ammonia complex ions when silver ammonia solution is added dropwise later. By strictly controlling the growth rate of silver powder from crystal seeds to particles, the present invention reduces the structural defects caused by rapid growth and improves the performance of the final product.

The application provides a weathering steel surface rust layer stabilizing treatment agent for industrial atmospheric environment, and the chemical composition of the weathering steel surface rust layer stabilizing treatment agent is as follows in terms of mass fraction: 25-45% of acrylic resin, 2.0-6.0% of chromium sulfate, 3.0-8.0% of ferrous oxide, 2.0-6.0% of ferric oxide, 0.5-3.5% of copper sulfate, 0.3-1.5% of sodium bisulfite, 1.0-6.0% of sodium molybdate, 0.5-3.5% of nickel sulfate, 2.0-5.0% of potassium phosphate, 0.05-0.5% of surfactant, 0.05-0.5% of defoaming agent, 0.05-0.5% of dispersing agent, 0.05-0.5% of thickening agent, and the balance is water, wherein the amount of plasticizer added is 2-5% of the resin. The stabilizing treatment agent in the application can promote the weathering steel surface to form a stable and dense rust layer within 0.5-1 year after the surface of the weathering steel is treated before use.

The invention discloses a method for extracting copper fine powder by flotation of copper-containing ore, which belongs to the technical field of mineral processing, and comprises the following steps: after copper-containing raw ore is crushed, ground and classified by a cyclone, overflow enters flotation, and settled sand is returned for regrinding; sodium carbonate is added into graded overflow to adjust the pH, a sodium hexametaphosphate-polyacrylamide composite dispersant is added, and copper sulfate is added and stirred after low-temperature microwave heating; gradient flotation is conducted, specifically, copper sulfide is roughly selected, the pH is adjusted, an amino-sulfonic acid group synergistic modified layered double metal hydroxide / cobalt ferrite composite collecting agent is added, and rough concentrate 1 is obtained through high-frequency pulse air inflation flotation; copper oxide roughing is conducted, clear water is supplemented to adjust the pH, and a collecting agent is supplemented to obtain rough concentrate 2; scavenging is performed for three times, a collecting agent is added for flotation, and concentrate returns to the previous stage; the rough concentrates are combined, and magnetic impurities are removed through high-gradient magnetic separation to obtain magnetic concentrates; and carrying out microbiological leaching on tailings to recover copper. The composite collecting agent is prepared through layered double hydroxide carrier synthesis, amino modification, sulfonic acid group grafting and cobalt ferrite anchoring.

The invention discloses a high-calcium suspension fertilizer as well as a preparation method and application thereof, and relates to the technical field of chemical fertilizer production, the high-calcium suspension fertilizer comprises the following components in parts by weight: 20-30 parts of a macroelement fertilizer, 10-15 parts of a medium element fertilizer, 3-5 parts of a microelement fertilizer, 0.5-3 parts of an auxiliary agent and 30-50 parts of deionized water; the macroelement fertilizer is prepared from 30-50 parts of nitrogen fertilizer, 20-30 parts of phosphate fertilizer and 15-20 parts of potash fertilizer; the medium element fertilizer is modified nano calcium carbonate and magnesium carbonate; the trace element fertilizer is prepared from zinc amino acid, sodium tetraborate, ferric sodium ethylenediaminetetraacetate, molybdenum sodium ethylenediaminetetraacetate, manganese sulfate monohydrate and copper sulfate pentahydrate. Therefore, the nano calcium carbonate can be quickly absorbed by the plants, so that calcium ions can be supplemented in time in the growth process of the plants, and the growth of the plants is accelerated.

The invention belongs to the technical field of microalgae culture, and particularly provides a haematococcus pluvialis culture medium and a preparation method thereof.The haematococcus pluvialis culture medium is prepared from 1-3 mg / L of sodium acetate, 0.01-1 mg / L of cobalt nitrate hexahydrate, 0.01-1.6 mg / L of copper sulfate, 0.1-1.2 mg / L of zinc sulfate heptahydrate, 1-3 mg / L of manganese chloride tetrahydrate, 1-10 mg / L of boric acid, 1-30 mg / L of sodium carbonate, 1100-1500 mg / L of sodium nitrate, 0.01-6 mg / L of EDTA, 20-50 mg / L of calcium chloride, 70-100 mg / L of magnesium sulfate heptahydrate, 40-100 mg / L of monopotassium phosphate trihydrate and 0.02 g of inorganic phosphorus; the method comprises the following specific steps: S1, culturing haematococcus pluvialis to a stable phase by a conventional method, inoculating haematococcus pluvialis species into a haematococcus pluvialis culture medium, and culturing; s2, shaking table; s3, culturing for 45 hours; s4, inoculating the seed solution into a haematococcus pluvialis culture medium, and continuously culturing in the shaking table for 6-15 days; the culture medium disclosed by the invention has a good promotion effect on the growth of haematococcus pluvialis and the accumulation of astaxanthin.

The invention provides a neutralization and utilization method of an acidic waste etching solution. The method comprises the following steps: mixing the acidic etching waste liquid with an ammonium bicarbonate solution; in the mixing process, the mixing temperature is controlled to be 40-60 DEG C, the pH value is adjusted to be 3.5-4.5, and slurry is obtained; separating the slurry to obtain copper oxychloride wet crystals and an ammonium chloride crude product solution; carrying out dechlorination treatment on the copper oxychloride wet crystals by using an alkaline solution, and filtering to obtain a copper oxide filter cake and chloride waste liquid; the temperature of the dechlorination treatment is 70-90 DEG C; performing post-treatment on the copper oxide filter cake to obtain copper sulfate; and carrying out precipitation treatment on the ammonium chloride crude product solution to obtain an ammonium chloride finished product solution. Wherein the step S3 and the step S4 have no sequence. According to the method, electroplating-grade copper sulfate and industrial-grade ammonium chloride products are prepared by using ammonium bicarbonate and realizing full utilization of anions and cations in the acidic etching waste liquid.

The invention discloses a preparation method of a high-temperature superconducting wire strip with high strength, high shunt and high heat-conducting property. The method comprises the following steps: 1, cleaning a semi-finished superconducting wire strip; 2, putting the cleaned semi-finished superconducting wire strip serving as a cathode and a copper electrode serving as an anode into copper sulfate electroplating liquid, and connecting with a direct-current power supply to form an electroplating device; and 3, after electroplating the cathode semi-finished superconducting wire strip, taking out the cathode semi-finished superconducting wire strip and staying in the air, and forming an electroplated layer of nano-scale copper grains by a process of repeatedly electroplating and taking out for multiple times, thereby obtaining the high-temperature superconducting wire strip. According to the invention, the surface of the semi-finished superconducting wire strip is plated with the electroplated layer of the nano-scale copper crystal grains through electroplating, and the high-temperature superconducting wire strip has high strength, high shunting and high heat-conducting properties by utilizing the strong pinning characteristic of the nano-copper crystal grains and the intrinsic high electric conductivity and high heat-conducting characteristics of copper, resists Lorentz force in a strong magnetic field, and has the characteristics of high conductivity and high heat conductivity. And the shunting and heat conduction capabilities of the high-temperature superconducting wire strip after quenching are improved, the process is simple, and industrial production is easy.

The invention provides an electroplating solution for Damascus copper interconnection and an electroplating process of the electroplating solution. The plating solution comprises copper sulfate, sulfuric acid, chloride ions and an organic additive. The organic additives comprise an accelerator, an inhibitor and a leveling agent. By adopting the electrocoppering solution disclosed by the invention, the effects of no cavity, compact structure, small surface roughness and smoothness can be realized at advanced nodes, and the electrocoppering solution has a good application prospect in semiconductor wafer manufacturing.

The invention provides a preparation method of ultrahigh-purity copper. The preparation method comprises the following steps: providing a first anode, a first cathode and an electrolyte; the electrolyte comprises the following components: a purified copper salt solution, inorganic acid, an oxidizing agent and an additive, the purified copper salt solution comprises purified copper salt and water, the purified copper salt comprises copper sulfate and copper nitrate, and the molar ratio of nitrate to sulfate in the purified copper salt solution is (1.5-9): 1; the additive comprises any one or a combination of at least two of an alcohol compound, polyacrylamide or a tetrazole compound; and the first cathode and the first anode are immersed in the electrolyte for electrochemical deposition, and the ultra-high-purity copper is obtained. The electrolyte composed of the purified copper salt solution, the inorganic acid, the oxidizing agent and the additive is adopted, the proportion of nitrate radicals to sulfate radicals in the purified copper salt solution is controlled, the impurity content of the sulfur element and the silver element in the electrolyte can be controlled, and preparation of the ultra-pure electrolytic copper is achieved.

The invention is applicable to the technical field of biomedical materials, and provides an anti-inflammatory hemostatic composite gel microsphere and a preparation method and application thereof, and the preparation method comprises the following steps: mixing sodium alginate and baicalin, dissolving in deionized water to obtain a mixed solution, spraying the mixed solution into a calcium chloride solution by utilizing electrospinning and electrospraying, and carrying out electrostatic spinning and electrospraying to obtain the anti-inflammatory hemostatic composite gel microsphere. Gel microspheres are formed through ionic crosslinking; washing the gel microspheres with a calcium chloride solution, and soaking the gel microspheres in a chitosan acetic acid solution to obtain chitosan-encapsulated gel microspheres; placing the gel microspheres in a copper sulfate solution, and performing low-temperature calcium-copper ion exchange to obtain baicalin / copper alginate composite gel microspheres; and filtering, washing and freeze-drying the composite gel microspheres. The electrospray technology is combined with ionic crosslinking, the size and morphology of the microspheres are accurately controlled, the antibacterial effect on escherichia coli and staphylococcus aureus is remarkable, the in-vitro blood coagulation time is shortened by 30%, the cytotoxicity is low, and good biocompatibility is achieved.

The invention discloses a blending method of a copper plating bearing agent, which comprises a blending device, and the blending device is provided with a structure for simultaneously starting multiple powers with a stirring structure for a feeding port and is used for blending the copper plating bearing agent; the method comprises the following steps: raw material pretreatment, device debugging, step-by-step feeding, and starting of a multi-power structure by a filter screen plate. And the concentration is finely adjusted until the concentration of the copper plating bearing agent reaches the standard, and qualified mixed liquid is guided out. By adopting the method, the adding uniformity of the copper sulfate pentahydrate powder and the overall blending efficiency are improved, accurate blending of the copper plating bearing agent is guaranteed, and accurate control over the concentration of the copper plating bearing agent can be achieved through step-by-step input, medium-term sampling detection and fine adjustment.

The invention discloses a preparation method of gardenia blue pigment. The preparation method comprises the following steps: (1) precipitating and removing impurities by copper sulfate: precipitating and removing impurities from column liquid after gardenia yellow is extracted by copper sulfate to obtain supernate; (2) oxidizing and decoloring by potassium permanganate and removing excessive copper ions: performing neutral oxidation on the supernate by potassium permanganate to obtain decolored supernate; (3) nanofiltration concentration and spray drying: carrying out alkaline nanofiltration concentration and spray drying on the decolorized supernatant to obtain a geniposide solid crude product; (4) extracting geniposide with propyl alcohol and recrystallizing: extracting the crude product with ethyl acetate and recrystallizing to obtain a fine geniposide product; (5) ethyl acetate two-phase acid hydrolysis: carrying out ethyl acetate two-phase acid hydrolysis and recrystallization on the refined product to obtain a genipin pure product; and (6) preparing a gardenia blue pigment pure product: reacting the genipin pure product with sodium isoleucine to obtain the gardenia blue pigment. The method is simple and easy to implement, convenient to operate, outstanding in product characteristics, easy in equipment type selection and matching, low in equipment investment, high in product additional value, good in economic benefit and capable of being mechanized.

The invention discloses a high-chlorine industrial wastewater treatment and chlorine recovery method, which comprises the following steps: sequentially adding copper sulfate and a carbon-sulfur reducing agent into to-be-treated high-chlorine wastewater according to a ratio, adjusting the pH value, generating chlorine-containing residues, precipitating and separating out the chlorine-containing residues from a water body, and carrying out decoloration treatment on dechlorinated tail water by adopting an electrolytic bath, copper sponge deposited at the cathode is subjected to impurity removal treatment and then is merged into a copper salt circulating system; chlorine-containing residues are subjected to dissolution and quality-divided treatment, an obtained solution phase is concentrated / crystallized, KCl is recycled, an obtained copper-containing precipitate and the sponge copper are combined and collected, the mixture is dissolved by means of dilute sulfuric acid in the oxidizing atmosphere, and the whole mixture returns to a wastewater dechlorination treatment system. CuSO4 is reduced to generate Cu < + > ions to precipitate and remove chloride ions in the wastewater, the obtained KCl product is used at a high value, and the cuprous precipitate is subjected to conversion treatment and is completely reused in the dechlorination process, so that the wastewater treatment cost is remarkably reduced, and the method has the obvious advantages of high dechlorination efficiency, no generation of solid wastes and the like, and is suitable for industrial production. And the method has wide adaptability to industrial circulating water containing 2.5-8.5 g / L of chlorine, membrane-process strong brine and the like.

The invention discloses a method for improving copper plating uniformity of a circuit board. The method comprises the following steps: performing surface treatment on a drilled circuit board; the circuit board is placed in the electroplating solution to be electroplated, and the technological conditions are that the temperature of the electroplating solution is 20-30 DEG C, and the current density is 1.5-2.5 A / dm < 2 >; the main chemical components of the electroplating solution comprise copper sulfate pentahydrate, sulfuric acid, hydrochloric acid and an additive, the concentration of the copper sulfate pentahydrate is 200-250 g / L, the concentration of the sulfuric acid is 50-70 g / L, and the concentration of chloride ions is 70-90 ppm. According to the method for improving the copper plating uniformity of the circuit board, by optimizing the components of the electroplating liquid and the parameters of the electroplating process, a plating layer is more uniform, the copper thickness range inside and outside holes is controlled to be about 8.0 microns, and the requirements of high-reliability PCBs (such as HDI and carrier plates) with the thickness-diameter ratio larger than 8: 1, such as 5G communication backboards and the like are met.

The invention discloses a pulse copper plating process with low TOC and high deep plating capacity. The pulse copper plating process comprises the following steps that 1, pretreatment is conducted, specifically, a substrate is subjected to cleaning, oil removing and acid etching rust removing treatment; 2, surface treatment: treating the surface of the substrate by using a treating agent; thirdly, acid copper sulfate copper plating is conducted, specifically, the treated substrate is placed in a copper plating tank, and electroplating is conducted through a copper electroplating solution of high-purity copper sulfate with the purity being 99.8%; 4, post-treatment is conducted, specifically, the copper-plated substrate is cleaned and dried; step 5, inspection: performing external inspection and performance inspection on the dried substrate; by adding the electroplating liquid, reducing the bath changing frequency and reducing the sewage treatment capacity, the production cost is reduced, the pollution to the environment is greatly reduced, and the production cost of an enterprise is reduced; tOC is low under the same load condition, the cylinder changing frequency is reduced, and wastewater discharge is reduced; meanwhile, due to low TOC, the service life of the additive can be doubled, and the production cost is reduced.

The invention provides a spathiphyllum hydroponic moss inhibitor, which comprises a natural plant extract, sodium chloride, acetic acid, biological enzyme and one of copper sulfate or bromocyanoacetamide, the use concentration of the natural plant extract is 2-3.2 ml / L, the use concentration of the copper sulfate is 4-16 mg / L, the purity of the bromocyanoacetamide is 99%, the use concentration is 5 mg / L, and the use concentration of the biological enzyme is 1-2 mg / L. The natural plant extract is cinnamon oil, acetic acid or tea tree oil. CuSO4, LDBNPA (99%) and EM bacteria are finally and successfully proportioned and mixed, so that moss breeding can be inhibited on the premise that normal growth and development of spathiphyllum are guaranteed. The nutrient solution can be used for inhibiting moss breeding when spathiphyllum is hydroponically cultured at home and a large number of spathiphyllum commercial seedlings are hydroponically cultured in factories, so that the time cost can be better saved, and the interval time for replacing the nutrient solution is prolonged.

The invention discloses a device for preparing copper sulfate from waste etching liquid. The device comprises a box body, wherein a separation chamber, a reaction chamber and a concentration chamber are sequentially arranged inside the box body from bottom to top, the separation chamber and the reaction chamber being connected via a connecting pipe. A buffer tank and a plurality of filter tanks are fixed on the top of the box body and are connected via a connecting pipe to the top of the concentration chamber. The concentration chamber is provided with a heating pipe. A stirring assembly is provided on one side of the reaction chamber. An extraction assembly is provided on the top of the separation chamber. A concentrated sulfuric acid tank is provided on one side of the box body and is connected via a connecting pipe to the top of one side of the reaction chamber. A fan is provided on the other side of the box body and is connected to the top of one side of the separation chamber. An air outlet pipe is also provided and is connected to the tops of the concentration chamber and the separation chamber, respectively. The air outlet pipe is connected to a purifier. Several of the connecting pipes are provided with flow meters and solenoid valves.

The invention relates to a method for preparing a magnetic Fe3O4 / Cu / nitrogen-doped carbon composite material by a one-step method and an application of the magnetic Fe3O4 / Cu / nitrogen-doped carbon composite material, and aims to solve the problems of poor catalytic activity, complex separation and recovery and complex synthesis method of the existing PMS activated catalytic material. According to the method, melamine is selected as a carbon source and a nitrogen source, ferric nitrate and copper sulfate are selected as an iron source and a copper source respectively, and the magnetic Fe3O4 / Cu / nitrogen-doped carbon composite material is synthesized in one step by adopting a high-temperature pyrolysis method. The adsorbent not only has excellent adsorption performance on dye-methylene blue, but also can realize high-efficiency oxidative degradation. The magnetic Fe3O4 / Cu / nitrogen-doped carbon composite material prepared by the invention not only has excellent catalytic performance, but also is easy to magnetically separate and recycle, and is suitable for efficient treatment of dye wastewater. The method is applied to the field of catalytic degradation of wastewater.