35 results about "Copper(II) hydroxide" patented technology

A wood preservative includes injectable particles comprising one or more sparingly soluble copper salts. The copper-based particles are sufficiently insoluble so as to not be easily removed by leaching but are sufficiently soluble to exhibit toxicity to primary organisms primarily responsible for the decay of the wood. Exemplary particles contain for example copper hydroxide, basic copper carbonate, copper carbonate, basic copper sulfates including particularly tribasic copper sulfate, basic copper nitrates, copper oxychlorides, copper borates, basic copper borates, and mixtures thereof. The particles typically have a size distribution in which at least 50% of particles have a diameter smaller than 0.25 μm, 0.2 μm, or 0.15 μm. At least about 20% and even more than 75% of the weight of the particles may be composed of the substantially crystalline copper salt. Wood or a wood product may be impregnated with copper-based particles of the invention.

The invention discloses a method of rapidly preparing a metal organic framework material thin-film from hydroxide nanowires and organic ligands under a normal temperature. The method comprises (1) adding an ethanolamine aqueous solution into cupric nitrate, zinc nitrate or cadmium nitrate aqueous solution of a same volume under magnetic stirring, slowing down a stirring speed to obtain corresponding copper hydroxide, zinc hydroxide or cadmium hydroxide nanowire solution, and directly filtering the nanowire solution through a porous alumina film to form a nanowire layer; (2) adding the nanowire layer into an organic ligand solution with ethanol, octanol or N,N-dimethyl formamide as a solvent, and reacting for 30 minutes under the normal temperature to obtain the metal organic framework material thin-film. The method provided by the invention can directly prepare large-area compact thin-film on a porous substrate under the normal temperature, and the method is simple in operation steps, low in cost, and environmental-protective. Reaction residues can be easily recovered. The prepared thin-film can stably exist. The method expands an application range of the metal organic framework material thin-film.

A process for preparing a high-purity metal salt of complexon as trace-element fertilizer includes adding complexon and alkali (sodium hydroxide, potassium hydroxide, or ammonia) to water, reaction while stirring to obtain complexon salt, adding metal salt (iron hydroxide, manganese hydroxide, etc.) at 150 deg.C for 0.5-5 hr, and filter to remove insoluble substance.

The invention belongs to the technical field of nanoscale copper powder preparation and provides a method for preparing cubic nano copper powder. The method comprises the steps that copper salt servesas a raw material, deionized water or absolute ethyl alcohol serves as a solvent, a stearic acid or oleic acid is added to a solution to serve as a protective agent and a dispersing agent, then a high-concentration alkali solution is added, the high-concentration alkali solution and the copper slat are made to generate copper hydroxide colloid, the pH of the solution is adjusted through the alkali solution, and the solution is made to be alkaline; and then, hydrazine hydrate serves as a reducing agent to be added to the prepared copper hydroxide colloid drop by drop, the mixture is heated atthe constant temperature of 20-90 DEG C, a reaction is performed for 10-300 minutes, and the cubic nano copper powder can be obtained. The copper powder in the prepared nano copper powder is in a cubeshape, particle size distribution is uniform, the average edge length is 100 nm, the yield is 90% or above, the dispersity is extremely high, the phenomenon of particle aggregation does not exist, and the cubic nano copper powder can be dispersed in water as well as in a weak solvent; and the method is simple in process, low in heating temperature, low in energy consumption and suitable for large-batch production.

The invention relates to a method for removing iron and arsenic in a copper sulfate solution and belongs to the field of nonferrous metal hydrometallurgy. The method comprises the following steps: under a stirring condition, adding copper hydroxide slag to a copper sulfate solution containing a certain amount of iron and arsenic, controlling the pH of the solution to the range of 1.0-2.0, adding industrial-grade hydrogen peroxide in a certain molar ratio according to the content of iron and arsenic in the solution to oxidize the low-valence state iron and arsenic in the solution, and then adding the copper hydroxide slag again, controlling the final pH to the range of 2.0-3.5, and after liquid-solid separation, crystalizing the solution removed from iron and arsenic to prepare a copper sulfate product or an electro-deposited cathode copper product, and treating the filter cake in a lead smelting system. The method is capable of efficiently removing the iron and arsenic in the copper sulfate solution; the iron removal rate is within the range of 99.20-99.80% and the arsenic removal rate is within the range of 95.86-99.22%; and no impurity ion is introduced in the whole process, and the whole process is clean and efficient in production.

The invention provides a method for recovering copper from a copper sulfate solution, comprising the following steps of: A) mixing calcium oxide and/or calcium hydrogen carbonate with calcium sulfate as a seed crystal; B) mixing the mixture of the calcium oxide and/or the calcium hydrogen carbonate and the calcium sulfate with the copper sulfate solution to generate a calcium sulfate sediment and a copper hydrogen carbonate sediment; and C) separating the calcium sulfate and copper hydrogen carbonate sediment. The method for recovering the copper from the copper sulfate solution can recover the copper from the copper sulfate solution in the mode of low cost and pollution to recycle resources and also can produce the calcium sulfate (plaster), thereby reducing the production cost and relieving the environmental pollution.

The invention discloses a preparation method of a nano-copper-coated aluminum composite fuel. The preparation method comprises the steps of adding trace copper ion complexing agent trisodium citrate and aluminum ion complexing agent ammonium fluoride into mixed water-phase turbid liquid of copper hydroxide and aluminite powder; centrifugally separating a purple red product obtained through reaction; and obtaining the nano-copper-coated aluminum composite fuel. The process provided by the invention is carried out at normal temperature and normal pressure, no any surface active agent is introduced, and the obtained nano-copper is uniformly distributed on the surface of nano-aluminum and uniform in grain size; and the concentration of the trace copper ion complexing agent is regulated, and the granularity of the obtained nano-copper particles can be further adjusted.

The nickel-cadmiunm accumulator includes negative pole of cadmium oxide and positive pole of nickel hydroxide. The negative pole of cadmium oxide is adhered one and dry powder for the negative pole consists of active cadmium oxide, conducting agent and other additives, and the conducting agent is copper hydroxide in the added amount of 1-5 % of the dry powder weight. The positive pole has spherical granular nickel hydroxide as its active matter. Using copper hydroxide as the conductive additive for the cadmium negative pole can improve the performance of Ni-Cd accumulator, lower its internal resistance, reduce capacity attenuation and raise great current discharge performance.

The invention discloses a method for recovering copper from waste version rollers used for printing to prepare copper oxide powder. The waste version rollers used for printing are treated by acid to dissolve chrome on the surfaces of the waste version rollers, and waste version rollers without chrome on the surfaces are prepared; the waste version rollers without chrome on the surfaces are placedin an ammonia solution, copper on the surfaces of the waste version rollers is dissolved by introduced air, and an ammonia copper carbonate solution is obtained; the ammonia copper carbonate solutionis transferred into a heating kettle and slowly heated to 100 DEG C within 1-2 h, the temperature is preserved for 1 h, after ammonia gas is completely released, copper hydroxide is prepared, and thereleased ammonia gas is absorbed by an absorbing device for recycling; copper hydroxide mixed liquid is transferred into a sedimentation pond and separated from water through sedimentation, and solidsare aired to obtain copper hydroxide powder; the copper hydroxide is subjected to calcining at the high temperature to prepare the copper oxide powder. The method is simple in method, the operation is easy, there are fewer reaction by-products, the productive rate of the copper oxide powder reaches 95%, and the purity reaches 98% or above.

A method for producing stable copper(II) hydroxide. The method comprises the treatment of a copper metal powder in an acidic aqueous solution containing acetic acid in the pH range less than 3.0 and at temperature below 30 ° C. under stirring conditions. To this acidic solution an alkali metal hydroxide solution is added to raise the pH above 7.0 to form copper(II) hydroxide. The method also comprises preparation of copper(II) hydroxide by treating the copper salts water solution with an alkali metal hydroxide solution in the pH range 7.0 to 12. To improve the stability of the copper(II) hydroxide prepared according to all the said method, a small amount of alkali or alkaline metal gluconate can be added to the suspension before or after the reaction. Also disclosed is a composition comprising stabilized copper(II) hydroxide prepared according to the method and at least one of a plant derived extract demonstrated to have antifungal, antibacterial or antiviral activity as a solid or a liquid or as a surfactant or as a coating.

The invention provides a method for preparing copper chloride dihydrate by alkaline type copper chloride. The method comprises the steps of: (1) stirring hydrochloric acid, adding alkaline type copper chloride into the hydrochloric acid, controlling the concentration of free hydrogen chloride at 0.8-8% for 20-40min, and completely dissolving the added material till no sediment exists; and (2) carrying out negative pressure distillation to the material completely dissolved in the step (1) for 8-10 hours, and cooling and crystallizing after finishing evaporation, filtering, centrifuging and separating to obtain copper chloride dihydrate. The alkaline type copper chloride is adopted as an initial raw material, not only can the production efficiency be improved, but also the production cost can be lowered; copper hydroxide contained in the alkaline type copper chloride more easily reacts with hydrochloric acid, and the consumption of the hydrochloric acid can be more effectively reduced through the copper chloride component; and the preparation method is simple, low in cost, higher in efficiency by 20-30% compared with the existing method, thus being suitable for industrialized production.

The invention discloses gel polymer electrolyte of blended ceramic as well as a preparation method and application of the gel polymer electrolyte. The preparation method particularly comprises the following steps: (1) preparing a blended polymer solution; (2) sequentially dropwise adding zirconium nitrate and acetylacetone which account for 5% of the total content of the blended polymer solution into the blended polymer solution A, continuously stirring for 15-30 minutes, and dropwise adding a copper hydroxide solution which accounts for 2% of the total content of the blended polymer solution,so as to obtain a mixed solution B; and (3) spraying the obtained mixed solution B to an electrode membrane or a carrier, and naturally drying, so as to obtain the gel polymer electrolyte mixed withceramic (a ceramic skeleton structure consisting of zirconium, hafnium and copper). The prepared ceramic skeleton structure consisting of zirconium, hafnium and copper has relatively strong mechanicalproperties, and the compound oxide can generate free metal ions due to the running of current in a working process of a lithium battery, so that the electrical conductivity can be improved, and meanwhile, an attenuation phenomenon caused due to the aging of the electrolyte can be remedied; and the electrolyte has relatively good infiltration effect to an electrolyte solution and further has goodelectrochemical stability, so that the conductivity, mechanical strength and safety performance of a polymer film can be improved.

The invention relates to a method for separating zinc, cadmium, copper, lead and silver from zinc smelting copper slag and belongs to the field of wet-process metallurgy of nonferrous metals. The method comprises the following steps: directly slurrying mixed copper slag without ore grinding; leaching by adopting a pressure reactor; controlling the technical parameters of acid volume, temperature, oxygen partial pressure, reaction time, terminal pH value and the like; dissolving out zinc and cadmium from the copper slag into a solution; dissolving out copper, and hydrolyzing the copper into copper hydroxide which is added into the slag again; performing liquid-solid separation and washing on a leached ore pulp, and then adding the filtrate containing zinc and cadmium and a washing solution into a zinc smelting system to recover zinc and cadmium; adding sulfuric acid to a filter cake, and controlling the leaching terminal pH value at a normal temperature and a normal pressure to ensure that copper is leached out; and performing liquid-solid separation on a copper leaching ore pulp, and then adding the obtained lead and silver slag into a lead smelting system to recover lead and silver. By adopting the technical scheme of the invention, zinc, cadmium and copper can be completely separated, copper is completely separated from lead and silver, the valuable metals of Cu, Zn, Cd, Pb, Ag and the like in the copper slag can be completely recycled, the whole process avoids the generation of 'three wastes', and the production is clean and efficient.

The invention discloses preparation and an application of a nano copper hydroxide controlled release system. The preparation of the nano copper hydroxide controlled release system comprises preparation of a copper-glycerin solution and dilution of the copper-glycerin solution, wherein the pH value of the copper-glycerin solution is 13.30-13.40. The copper-glycerin solution is prepared and water is added into the copper-glycerin solution to dilute and slowly release nano copper hydroxide; and compared with a traditional coordinate precipitation method, the preparation has the advantages of relatively low requirements on equipment, relatively low production cost, easiness of controlling granularity, environmental friendliness, simplicity and easiness of operation. The copper-glycerin solution is modified by adopting SDBS (Sodium Dodecyl Benzene Sulfonate) so that the nano copper hydroxide can be slowly released in relatively short time without stirring after the dilution, and furthermore, the solution can be directly applied to plants and is used for preventing and treating plant diseases.

The invention discloses a method for manufacturing iron-copper alloy from iron oxide red and copper sulfate. The method includes technological steps of (1), adding sodium hydroxide solution into copper sulfate solution, and stirring a mixture of the sodium hydroxide solution and the copper sulfate solution to generate blue copper hydroxide gel; (2), heating, filtering and drying the copper hydroxide gel to obtain copper oxide;(3), mixing a certain amount of copper oxide with the iron oxide red, and grinding and uniformly mixing the copper oxide and the iron oxide red to obtain a mixture; and (4), heating and pretreating the mixture in inert atmosphere, and then enabling the mixture to carry out reduction reaction to obtain the iron-copper alloy. The certain amount of the copper oxide is calculated according to the proportion of iron to copper of the manufactured iron-copper alloy. The method has the advantages that the regenerated iron oxide red of cold-rolling waste acid and the copper sulfate are used as raw materials, iron-copper alloy powder is manufactured by means of reduction reaction, as the iron-copper alloy powder is widely applied and is high in selling price, the additional value of the iron oxide red is greatly increased, and a novel utilization channel of the iron oxide red is provided; and the superiority of an iron and steel enterprise is sufficiently utilized, an operation process is simple, and the cost is low.